Pub Date : 2024-08-01DOI: 10.1016/j.scispo.2024.05.001
{"title":"Erratum to “Effect of three different protocols of aerobic interval exercise over fat oxidation“. Science & Sports 39 (2024) 105–111","authors":"","doi":"10.1016/j.scispo.2024.05.001","DOIUrl":"10.1016/j.scispo.2024.05.001","url":null,"abstract":"","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0765159724000807/pdfft?md5=d71dbfbe0c70ca80d39d745b713e56ab&pid=1-s2.0-S0765159724000807-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1016/j.scispo.2023.08.005
Background and purpose
Mitochondrial dysfunction is a major marker of aging, and alterations in the structure or content of cardiolipin (CL), a phospholipid unique to mitochondria, are thought to contribute to mitochondrial dysfunction and decreased physical performance. Exercise induces upregulation of CL levels and improves physical fitness, however, current studies reported in the literature addressing the effects of exercise interventions on cardiolipin biosynthesis are inconsistent, and the improved outcomes of different intervention protocols and cycles are controversial. Therefore, a systematic evaluation and meta-analysis were performed in this study to evaluate the effect of exercise training on CL biosynthesis.
Methods
A literature search based on electronic databases (PubMed, Web of Science, Scopus, SPORT Discus, and EBSCO host) was performed and the final literature was identified based on inclusion and exclusion criteria. Review Manager 5.4.1 was used to evaluate the quality of the literature based on the Cochrane bias risk assessment tool and meta-analysis was performed, and Stata 17.0 software was used for sensitivity analysis.
Results
A total of 1037 articles were screened, of which 8 studies were included in the meta-analysis. The results of the fixed-effects meta-analysis showed that exercise significantly promoted CL biosynthesis compared to pre-intervention (SMD:0.62, 95%CI: 0.30–0.94). In subgroup analysis, the duration of exercise < 16 weeks (SMD: 0.67, 95%CI: 0.09–1.25) and ≥ 16 weeks (SMD: 0.60, 95%CI: 0.21–0.98), single exercise intervention (SMD: 0.69, 95%CI: 0.30–1.08) and combined exercise and calorie restriction intervention (SMD: 0.74, 95%CI: 0.16–1.33) all had significant promoting effects on CL biosynthesis.
Conclusion
The findings of this study indicate that exercise training can significantly increases human skeletal muscle CL levels regardless of the duration of exercise or the type of exercise intervention.
Contexte et but
Le dysfonctionnement mitochondrial est un marqueur majeur du vieillissement, et les altérations de la structure ou du contenu de la cardiolipine (CL), un phospholipide propre aux mitochondries, contribueraient au dysfonctionnement mitochondrial et à la diminution des performances physiques. L’exercice induit une augmentation des niveaux de CL et améliore la condition physique. Cependant, les études actuelles rapportées dans la littérature sur les effets des interventions d’exercice sur la biosynthèse de la cardiolipine sont incohérentes et les résultats améliorés des différents protocoles et cycles d’intervention sont controversés. Par conséquent, une évaluation systématique et une méta-analyse ont été menées dans cette étude dans le but d’évaluer l’effet de l’exercice sur la biosynthèse de la CL.
{"title":"Effects of exercise training on cardiolipin biosynthesis in human skeletal muscle mitochondria: A systematic review and meta-analysis","authors":"","doi":"10.1016/j.scispo.2023.08.005","DOIUrl":"10.1016/j.scispo.2023.08.005","url":null,"abstract":"<div><h3>Background and purpose</h3><p>Mitochondrial dysfunction is a major marker of aging, and alterations in the structure or content of cardiolipin (CL), a phospholipid unique to mitochondria, are thought to contribute to mitochondrial dysfunction and decreased physical performance. Exercise induces upregulation of CL<span> levels and improves physical fitness, however, current studies reported in the literature addressing the effects of exercise interventions on cardiolipin biosynthesis are inconsistent, and the improved outcomes of different intervention protocols and cycles are controversial. Therefore, a systematic evaluation and meta-analysis were performed in this study to evaluate the effect of exercise training on CL biosynthesis.</span></p></div><div><h3>Methods</h3><p>A literature search based on electronic databases (PubMed, Web of Science, Scopus, SPORT Discus, and EBSCO host) was performed and the final literature was identified based on inclusion and exclusion criteria. Review Manager 5.4.1 was used to evaluate the quality of the literature based on the Cochrane bias risk assessment tool and meta-analysis was performed, and Stata 17.0 software was used for sensitivity analysis.</p></div><div><h3>Results</h3><p><span>A total of 1037 articles were screened, of which 8 studies were included in the meta-analysis. The results of the fixed-effects meta-analysis showed that exercise significantly promoted CL biosynthesis compared to pre-intervention (SMD:0.62, 95%CI: 0.30–0.94). In subgroup analysis, the duration of exercise</span> <!--><<!--> <!-->16 weeks (SMD: 0.67, 95%CI: 0.09–1.25) and ≥<!--> <!-->16 weeks (SMD: 0.60, 95%CI: 0.21–0.98), single exercise intervention (SMD: 0.69, 95%CI: 0.30–1.08) and combined exercise and calorie restriction intervention (SMD: 0.74, 95%CI: 0.16–1.33) all had significant promoting effects on CL biosynthesis.</p></div><div><h3>Conclusion</h3><p>The findings of this study indicate that exercise training can significantly increases human skeletal muscle CL levels regardless of the duration of exercise or the type of exercise intervention.</p></div><div><h3>Contexte et but</h3><p>Le dysfonctionnement mitochondrial est un marqueur majeur du vieillissement, et les altérations de la structure ou du contenu de la cardiolipine (CL), un phospholipide propre aux mitochondries, contribueraient au dysfonctionnement mitochondrial et à la diminution des performances physiques. L’exercice induit une augmentation des niveaux de CL et améliore la condition physique. Cependant, les études actuelles rapportées dans la littérature sur les effets des interventions d’exercice sur la biosynthèse de la cardiolipine sont incohérentes et les résultats améliorés des différents protocoles et cycles d’intervention sont controversés. Par conséquent, une évaluation systématique et une méta-analyse ont été menées dans cette étude dans le but d’évaluer l’effet de l’exercice sur la biosynthèse de la CL.</p></div><div><h3>Méthodes</","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141961565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1016/j.scispo.2023.11.006
Objectives
The global socioeconomic burden of T2D necessitates effective strategies to improve self-care behaviors for proper diabetes management. This study aims to compare the effectiveness of wearing continuous glucose monitoring (CGM) device versus CGM combined with regular exercise (CGM + EX) in promoting diabetes self-care behaviors and glycemic control among individuals with type 2 diabetes (T2D).
Equipment and methods
The study included 65 participants with T2D who were randomly divided into three groups: control, CGM, and CGM + EX. The CGM group wore CGM devices for two weeks, the CGM + EX group wore CGM devices for the same duration while engaged in exercise prescription for 3 months. One-way ANOVA or repeated measure ANOVA, where appropriate, was performed to detect statistical differences (P < 0.05).
Results
Following the intervention, the Diabetes Self-care Scale (DSCS) scores in the control, CGM, and CGM + EX groups were 67.1 ± 11.9, 84.8 ± 19.3, and 112.7 ± 10.9, respectively. These results indicated improvements in DSCS scores for both interventions, with the combined use of CGM and exercise demonstrating greater enhancement compared to CGM alone (CGM vs. CGM + EX, P < 0.001). Notably, the combination of CGM and exercise was more effective in reducing 2-hour postprandial blood glucose values compared to the use of CGM alone (6.4 ± 1.3 vs. 9.5 ± 3.0, P < 0.01).
Conclusions
These findings highlight the importance of combining CGM device with regular exercise into diabetes management to enhance self-care behaviors, maintain glycemic control, and reduce the risk of long-term complications associated with T2D.
Objectifs
Face au fardeau socio-économique mondial que représente le DT2, il est nécessaire d’adopter des stratégies efficaces pour améliorer les comportements d’autosoins en vue d’une bonne gestion du diabète. Cette étude vise à comparer l’efficacité du port d’un dispositif de surveillance continue du glucose (CGM) associé ou non à une prescription d’exercices physiques réguliers (CGM + EX) pour promouvoir les comportements d’autosoins et le contrôle glycémique chez les personnes atteintes de diabète de type 2(DT2).
Matériel et méthodes
L’étude comptait 65 participants atteints de diabète de type 2, répartis au hasard en trois groupes: contrôle, CGM et CGM + EX. Le groupe CGM a porté des appareils CGM pendant deux semaines, le groupe CGM + EX a porté des appareils CGM pendant la même durée tout en s’engageant à une prescription d’e
{"title":"Exercise combing with short-term continuous glucose monitoring promotes diabetes health self-care scale and glycemic control in individuals with type 2 diabetes","authors":"","doi":"10.1016/j.scispo.2023.11.006","DOIUrl":"10.1016/j.scispo.2023.11.006","url":null,"abstract":"<div><h3>Objectives</h3><p><span>The global socioeconomic burden of T2D necessitates effective strategies to improve self-care behaviors for proper diabetes management. This study aims to compare the effectiveness of wearing continuous glucose monitoring (CGM) device versus CGM combined with regular exercise (CGM</span> <!-->+<!--> <!-->EX) in promoting diabetes self-care behaviors and glycemic control among individuals with type 2 diabetes (T2D).</p></div><div><h3>Equipment and methods</h3><p>The study included 65 participants with T2D who were randomly divided into three groups: control, CGM, and CGM<!--> <!-->+<!--> <!-->EX. The CGM group wore CGM devices for two weeks, the CGM<!--> <!-->+<!--> <span>EX group wore CGM devices for the same duration while engaged in exercise prescription for 3 months. One-way ANOVA or repeated measure ANOVA, where appropriate, was performed to detect statistical differences (</span><em>P</em> <!--><<!--> <!-->0.05).</p></div><div><h3>Results</h3><p>Following the intervention, the Diabetes Self-care Scale (DSCS) scores in the control, CGM, and CGM<!--> <!-->+<!--> <!-->EX groups were 67.1<!--> <!-->±<!--> <!-->11.9, 84.8<!--> <!-->±<!--> <!-->19.3, and 112.7<!--> <!-->±<!--> <!-->10.9, respectively. These results indicated improvements in DSCS scores for both interventions, with the combined use of CGM and exercise demonstrating greater enhancement compared to CGM alone (CGM vs. CGM<!--> <!-->+<!--> <!-->EX, <em>P</em> <!--><<!--> <!-->0.001). Notably, the combination of CGM and exercise was more effective in reducing 2-hour postprandial blood glucose values compared to the use of CGM alone (6.4<!--> <!-->±<!--> <!-->1.3 vs. 9.5<!--> <!-->±<!--> <!-->3.0, <em>P</em> <!--><<!--> <!-->0.01).</p></div><div><h3>Conclusions</h3><p>These findings highlight the importance of combining CGM device with regular exercise into diabetes management to enhance self-care behaviors, maintain glycemic control, and reduce the risk of long-term complications associated with T2D.</p></div><div><h3>Objectifs</h3><p><span>Face au fardeau socio-économique mondial que représente le DT2, il est nécessaire d’adopter des stratégies efficaces pour améliorer les comportements d’autosoins en vue d’une bonne gestion du diabète. Cette étude vise à comparer l’efficacité du port d’un dispositif de surveillance continue du glucose (CGM) associé ou non à une prescription d’exercices physiques réguliers (CGM</span> <!-->+<!--> <!-->EX) pour promouvoir les comportements d’autosoins et le contrôle glycémique chez les personnes atteintes de diabète de type 2(DT2).</p></div><div><h3>Matériel et méthodes</h3><p>L’étude comptait 65 participants atteints de diabète de type 2, répartis au hasard en trois groupes: contrôle, CGM et CGM<!--> <!-->+<!--> <!-->EX. Le groupe CGM a porté des appareils CGM pendant deux semaines, le groupe CGM<!--> <!-->+<!--> <span>EX a porté des appareils CGM pendant la même durée tout en s’engageant à une prescription d’e","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141142548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1016/j.scispo.2023.10.004
Aims
Subconcussive head impacts are used in the study of long-term sequelae associated with contact sport, such as football. Impact magnitude thresholds are used by scientists to allow for large-scale data collection and remove impacts of lower magnitude that may be attributed to jumping or running rather than actual head impact. However, it is unclear if below-threshold impacts are indeed all invalid. The aim of this study was to characterize below-threshold head impacts in varsity level football.
Methods
Retrospective video analysis of regular season games was performed during 5 different games on 13 different football players. Below-threshold impacts we coded for mechanism and type of impact as well as play situation. A total of 814 head impacts were analysed and over 18% of them consisted of below-threshold impacts attributed to visible head impacts. Below-threshold impacts ranged in magnitude from 3 to 9 g inclusively.
Conclusion
Our study suggests that below-threshold impacts may indeed be caused by actual head impacts and further studies are warranted to evaluate the physiological meaning of such impacts.
Objectifs
Les impacts sous-commotionnels sont étudiés dans le contexte des séquelles à long terme associées aux sports de contact, tel le football. Des seuils d’impact sont utilisés par les scientifiques afin de faciliter les collectes de données à grande échelle et d’éliminer les impacts de plus faible magnitude qui peuvent être attribués à des mouvements autres comme les sauts ou la course. Cependant, il n’est pas certain que ces impacts de faible intensité soient tous en effet non valides. Le but de cette étude était donc de caractériser les impacts à la tête sous les seuils dans le football universitaire.
Méthodes
Une analyse rétrospective de parties de football lors d’une saison régulière fût effectuée sur 5 parties auprès de 13 joueurs. Les impacts sous le seuil étaient codés en lien avec le mécanisme et le type de situation de jeu. Au total, 814 impacts à la tête furent analysés et 18 % d’entre eux étaient sous les seuils et étaient attribuables à des impacts visibles à la tête. Ces impacts étaient d’une intensité variant entre 3 et 9 g, inclusivement.
Conclusion
Notre étude suggère donc que les impacts sous les seuils peuvent en effet être attribuables à des impacts à la tête, et plus d’études sont nécessaires afin d’en évaluer leur valeur physiologique.
{"title":"Should less than 10 g impacts be included in the kinematic analysis of head impacts and their long-term risk of sequelae? A technical note","authors":"","doi":"10.1016/j.scispo.2023.10.004","DOIUrl":"10.1016/j.scispo.2023.10.004","url":null,"abstract":"<div><h3>Aims</h3><p>Subconcussive head impacts are used in the study of long-term sequelae associated with contact sport, such as football. Impact magnitude thresholds are used by scientists to allow for large-scale data collection and remove impacts of lower magnitude that may be attributed to jumping or running rather than actual head impact. However, it is unclear if below-threshold impacts are indeed all invalid. The aim of this study was to characterize below-threshold head impacts in varsity level football.</p></div><div><h3>Methods</h3><p>Retrospective video analysis of regular season games was performed during 5 different games on 13 different football players. Below-threshold impacts we coded for mechanism and type of impact as well as play situation. A total of 814 head impacts were analysed and over 18% of them consisted of below-threshold impacts attributed to visible head impacts. Below-threshold impacts ranged in magnitude from 3 to 9<!--> <!-->g inclusively.</p></div><div><h3>Conclusion</h3><p>Our study suggests that below-threshold impacts may indeed be caused by actual head impacts and further studies are warranted to evaluate the physiological meaning of such impacts.</p></div><div><h3>Objectifs</h3><p>Les impacts sous-commotionnels sont étudiés dans le contexte des séquelles à long terme associées aux sports de contact, tel le football. Des seuils d’impact sont utilisés par les scientifiques afin de faciliter les collectes de données à grande échelle et d’éliminer les impacts de plus faible magnitude qui peuvent être attribués à des mouvements autres comme les sauts ou la course. Cependant, il n’est pas certain que ces impacts de faible intensité soient tous en effet non valides. Le but de cette étude était donc de caractériser les impacts à la tête sous les seuils dans le football universitaire.</p></div><div><h3>Méthodes</h3><p>Une analyse rétrospective de parties de football lors d’une saison régulière fût effectuée sur 5 parties auprès de 13 joueurs. Les impacts sous le seuil étaient codés en lien avec le mécanisme et le type de situation de jeu. Au total, 814 impacts à la tête furent analysés et 18 % d’entre eux étaient sous les seuils et étaient attribuables à des impacts visibles à la tête. Ces impacts étaient d’une intensité variant entre 3 et 9<!--> <!-->g, inclusivement.</p></div><div><h3>Conclusion</h3><p>Notre étude suggère donc que les impacts sous les seuils peuvent en effet être attribuables à des impacts à la tête, et plus d’études sont nécessaires afin d’en évaluer leur valeur physiologique.</p></div>","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1016/j.scispo.2023.07.003
Objectives
The review of systematic reviews with meta-analyses is a scientifically important procedure for performing a qualitative analysis of published works. Thus, the objectives of this study were to systematically review the meta-analytic evidence verifying the effects of resistance training on muscular strength and/or hypertrophy in healthy adults and to address the quality of the meta-analytic evidence (CRD42020188928).
News
Systematic reviews with meta-analyses that verified the effects of resistance training on strength and/or hypertrophy in healthy young adults, published in English, were searched in the PubMed, Web of Science, and Cochrane databases. The searches resulted in 1915 references, and 19 references were included following the adopted criteria. The selected meta-analyses investigated a total of 587 randomized controlled trials – 159 evaluated strength, 160 hypertrophy, and 268 both outcomes, involving 12,375 subjects of both sexes. Of the 19 selected meta-analyses, 31.6% verified the effect size of muscle strength, 31.6% of hypertrophy, and 36.8% of both variables (strength and hypertrophy). Moderate correlations were observed in the AMSTAR 2 quality assessment with the assessment of the quality of evidence (0.64; P = 0.003) and with the year of publication of the studies (0.57; P = 0.03). The GRADE assessment indicated very low to high quality of evidence.
Conclusion
We observed systematic reviews with meta-analyses of fair to excellent methodological quality and very low to high quality of evidence; recording the protocol and following a standardized reporting plan for meta-analyses are fundamental to improving the quality of these studies.
Objectifs
L’examen des revues systématiques avec méta-analyses est une procédure scientifiquement importante pour effectuer une analyse qualitative des travaux publiés. Ainsi, les objectifs de cette étude étaient d’examiner systématiquement les preuves méta-analytiques vérifiant les effets de l’entraînement en résistance sur la force musculaire et/ou l’hypertrophie chez des jeunes adultes sains et d’examiner la qualité des preuves méta-analytiques (CRD42020188928).
Actualités
Des revues systématiques avec des méta-analyses qui ont vérifié les effets de l’entraînement en résistance sur la force et/ou l’hypertrophie chez de jeunes adultes en bonne santé, publiées en anglais, ont été recherchées dans les bases de données PubMed, Web of Science et Cochrane. Les recherches ont abouti à 1915 références, et 19 références ont été incluses selon les critères adoptés. Les méta-analyses sélectionnées ont enquêté sur un total de 587 essais contrôlés randomisés – 159 ont évalué la force, 160 l’hypertrophie et 268 les deux résultats, impliquant 12 375 sujets des deux sexes. Sur les 19 méta-analyses sélectionnées, 31,6 % ont vérifié l’ampleu
{"title":"Methodological quality of meta-analyses on resistance training to improve hypertrophy and strength in healthy young adults: An umbrella review","authors":"","doi":"10.1016/j.scispo.2023.07.003","DOIUrl":"10.1016/j.scispo.2023.07.003","url":null,"abstract":"<div><h3>Objectives</h3><p>The review of systematic reviews with meta-analyses is a scientifically important procedure for performing a qualitative analysis of published works. Thus, the objectives of this study were to systematically review the meta-analytic evidence verifying the effects of resistance training on muscular strength and/or hypertrophy in healthy adults and to address the quality of the meta-analytic evidence (CRD42020188928).</p></div><div><h3>News</h3><p>Systematic reviews with meta-analyses that verified the effects of resistance training on strength and/or hypertrophy in healthy young adults, published in English, were searched in the PubMed, Web of Science, and Cochrane databases. The searches resulted in 1915 references, and 19 references were included following the adopted criteria. The selected meta-analyses investigated a total of 587 randomized controlled trials – 159 evaluated strength, 160 hypertrophy, and 268 both outcomes, involving 12,375 subjects of both sexes. Of the 19 selected meta-analyses, 31.6% verified the effect size of muscle strength, 31.6% of hypertrophy, and 36.8% of both variables (strength and hypertrophy). Moderate correlations were observed in the AMSTAR 2 quality assessment with the assessment of the quality of evidence (0.64; <em>P</em> <!-->=<!--> <!-->0.003) and with the year of publication of the studies (0.57; <em>P</em> <!-->=<!--> <!-->0.03). The GRADE assessment indicated very low to high quality of evidence.</p></div><div><h3>Conclusion</h3><p>We observed systematic reviews with meta-analyses of fair to excellent methodological quality and very low to high quality of evidence; recording the protocol and following a standardized reporting plan for meta-analyses are fundamental to improving the quality of these studies.</p></div><div><h3>Objectifs</h3><p>L’examen des revues systématiques avec méta-analyses est une procédure scientifiquement importante pour effectuer une analyse qualitative des travaux publiés. Ainsi, les objectifs de cette étude étaient d’examiner systématiquement les preuves méta-analytiques vérifiant les effets de l’entraînement en résistance sur la force musculaire et/ou l’hypertrophie chez des jeunes adultes sains et d’examiner la qualité des preuves méta-analytiques (CRD42020188928).</p></div><div><h3>Actualités</h3><p>Des revues systématiques avec des méta-analyses qui ont vérifié les effets de l’entraînement en résistance sur la force et/ou l’hypertrophie chez de jeunes adultes en bonne santé, publiées en anglais, ont été recherchées dans les bases de données PubMed, Web of Science et Cochrane. Les recherches ont abouti à 1915 références, et 19 références ont été incluses selon les critères adoptés. Les méta-analyses sélectionnées ont enquêté sur un total de 587 essais contrôlés randomisés – 159 ont évalué la force, 160 l’hypertrophie et 268 les deux résultats, impliquant 12 375 sujets des deux sexes. Sur les 19 méta-analyses sélectionnées, 31,6 % ont vérifié l’ampleu","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0765159724000704/pdfft?md5=edc5fdcbf7ea51f17f7aae77ebb6181f&pid=1-s2.0-S0765159724000704-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141135159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1016/j.scispo.2023.10.001
S.-H. Ryu , J.-H. Oh , K.-W. Noh , S. Park
Objects
This study aimed to contribute towards improving athletic performance by comparing the effects of highly concentrated hydrogen intake before and during exercise on soccer players’ metabolic and athletic performance.
Materials and methods
This study followed a single-blind crossover design involving 10 male college soccer players. Before this experiment, the Vmax measurement and experimental familiarization stage were performed through pretesting. The exercise load test in this experiment involved a long-term intermittent high-intensity exercise protocol that reflects the specificity of soccer. It consisted of seven cycles taking about 120 minutes. Placebo (mineral water) or highly concentrated hydrogen water was administered 30 min before the exercise load test.
Results
The study revealed that, regarding the respiratory gas variable Respiratory Exchange Ratio (RER), the placebo intake experiment at exercise awareness was higher than that of the hydrogen water intake experiment (P < 0.05). There was no difference between the two experiments in terms of oxygen consumption (VO2) and carbon dioxide production (VCO2) (P > 0.05). Fat oxidation during exercise (P < 0.05), and running distance were higher after hydrogen water intake than after placebo, while running time, carbohydrate oxidation, active oxygen, and heart rate (P < 0.05) were higher after placebo than hydrogen water. The hydrogen water intake experiment in running distance and running time of exercise performance was higher than that of the placebo intake experiment (P < 0.05). The results of this study suggest that the intake of highly concentrated hydrogen water improves the ability to perform global motion and reduces the oxidative damage caused by active oxygen.
Objectifs
Cette étude visait à contribuer à améliorer les performances athlétiques en comparant les effets d’une ingestion d’eau fortement enrichie en hydrogène avant et pendant l’exercice sur les performances métaboliques et athlétiques de joueurs de football.
Matériel et méthodes
Cette étude croisée en simple aveugle a porté sur 10 footballeurs d’un club universitaire. Avant cette expérience, la mesure de la Vmax et une familiarisation préalable étaient effectuées. L’exercice effectué dans cette expérience utilisait un protocole intermittent à long terme d’exercice à haute intensité qui reflète la spécificité du football. Il s’agissait de sept cycles d’environ 120 minutes. On a administré un placebo (eau minérale) ou de l’eau fortement enrichie en hydrogène 30 min avant l’exercice, et on a mesuré les échanges gazeux respiratoires, les variables physiologiques, et les espèces réactives de l
{"title":"Effects of high concentration hydrogen water intake on active oxygen and performance in soccer players","authors":"S.-H. Ryu , J.-H. Oh , K.-W. Noh , S. Park","doi":"10.1016/j.scispo.2023.10.001","DOIUrl":"10.1016/j.scispo.2023.10.001","url":null,"abstract":"<div><h3>Objects</h3><p>This study aimed to contribute towards improving athletic performance by comparing the effects of highly concentrated hydrogen intake before and during exercise on soccer players’ metabolic and athletic performance.</p></div><div><h3>Materials and methods</h3><p>This study followed a single-blind crossover design involving 10 male college soccer players. Before this experiment, the V<sub>max</sub> measurement and experimental familiarization stage were performed through pretesting. The exercise load test in this experiment involved a long-term intermittent high-intensity exercise protocol that reflects the specificity of soccer. It consisted of seven cycles taking about 120<!--> <!-->minutes. Placebo (mineral water) or highly concentrated hydrogen water was administered 30<!--> <!-->min before the exercise load test.</p></div><div><h3>Results</h3><p>The study revealed that, regarding the respiratory gas variable Respiratory Exchange Ratio (RER), the placebo intake experiment at exercise awareness was higher than that of the hydrogen water intake experiment (<em>P</em> <!--><<!--> <!-->0.05). There was no difference between the two experiments in terms of oxygen consumption (VO<sub>2</sub>) and carbon dioxide production (VCO<sub>2</sub>) (<em>P</em> <!-->><!--> <!-->0.05). Fat oxidation during exercise (<em>P</em> <!--><<!--> <!-->0.05), and running distance were higher after hydrogen water intake than after placebo, while running time, carbohydrate oxidation, active oxygen, and heart rate (<em>P</em> <!--><<!--> <!-->0.05) were higher after placebo than hydrogen water. The hydrogen water intake experiment in running distance and running time of exercise performance was higher than that of the placebo intake experiment (<em>P</em> <!--><<!--> <!-->0.05). The results of this study suggest that the intake of highly concentrated hydrogen water improves the ability to perform global motion and reduces the oxidative damage caused by active oxygen.</p></div><div><h3>Objectifs</h3><p>Cette étude visait à contribuer à améliorer les performances athlétiques en comparant les effets d’une ingestion d’eau fortement enrichie en hydrogène avant et pendant l’exercice sur les performances métaboliques et athlétiques de joueurs de football.</p></div><div><h3>Matériel et méthodes</h3><p>Cette étude croisée en simple aveugle a porté sur 10 footballeurs d’un club universitaire. Avant cette expérience, la mesure de la V<sub>max</sub> et une familiarisation préalable étaient effectuées. L’exercice effectué dans cette expérience utilisait un protocole intermittent à long terme d’exercice à haute intensité qui reflète la spécificité du football. Il s’agissait de sept cycles d’environ 120<!--> <!-->minutes. On a administré un placebo (eau minérale) ou de l’eau fortement enrichie en hydrogène 30<!--> <!-->min avant l’exercice, et on a mesuré les échanges gazeux respiratoires, les variables physiologiques, et les espèces réactives de l","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140755987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1016/j.scispo.2023.01.008
M. Pradzynska, L.P. Rylands, D.C. Canham
Purpose
Inadequate sleep has a negative impact on the psychological and physiological health of elite athletes. Studies have shown a correlation exists between sleep deprivation and a drop in performance. Despite rising interest in sleep science, current research focus is on outcome and the cause of sleep deprivation is a secondary consideration. This scoping review aims to identify themes in peer-reviewed studies that are related to the possible causation of sleep deprivation in competitive athletes.
Method
A scoping review was conducted using the PRISMA-ScR guideline. Three databases were used to research for the literature PubMed, Medline and EBSCO.
Results
After applying inclusion and exclusion criteria 16 peer-reviewed studies were identified. The studies were categorised into two sub-categories of short- and long-term causes of sleep deprivation. Five themes were identified: travel, night performance, prior, during and following competition and concussion.
Conclusion
The findings of this scoping review identified a number a short and long-term causes of sleep deprivation. The causes of the short-term causes can be addressed by implementing some simple interventions such as napping, relaxation techniques and sleep hygiene could aid an athlete performance. However, the long-term causes were linked to concussion, any intervention would need to be studied in greater detail and is beyond the remit of this scoping review.
Objectif
Un sommeil insuffisant a un impact négatif sur la santé psychologique et physiologique des athlètes d’élite. Des études ont montré qu’il existe une corrélation entre la privation de sommeil et une baisse des performances. Malgré l’intérêt croissant pour la science du sommeil, la recherche actuelle se concentre sur les résultats et la cause de la privation de sommeil est une considération secondaire. La présente étude de portée vise à identifier les thèmes des études évaluées par des pairs qui sont liés à la cause possible de la privation de sommeil chez les athlètes de compétition.
Méthode
Une étude de portée a été effectuée selon les règles PRISMA-ScR. Trois bases de données ont été utilisées pour la recherche de la littérature : PubMed, Medline et EBSCO.
Résultats
Après application des critères d’inclusion et d’exclusion, 16 études évaluées par des pairs ont été identifiées. Les études ont été classées en deux sous-catégories de causes à court et à long terme de la privation de sommeil. Cinq thèmes ont été identifiés: déplacement, performance nocturne, avant, pendant et après compétition et commotion cérébrale.
Conclusion
Les résultats de cette étude de portée ont identifié un certain nombre de causes à court et à long terme de la privation de sommeil. Les causes à court terme peuvent être traitées en mettant en œuvre des interven
{"title":"Causes of sleep deprivation in competative athletes: A scoping review","authors":"M. Pradzynska, L.P. Rylands, D.C. Canham","doi":"10.1016/j.scispo.2023.01.008","DOIUrl":"10.1016/j.scispo.2023.01.008","url":null,"abstract":"<div><h3>Purpose</h3><p>Inadequate sleep has a negative impact on the psychological and physiological health of elite athletes. Studies have shown a correlation exists between sleep deprivation and a drop in performance. Despite rising interest in sleep science, current research focus is on outcome and the cause of sleep deprivation is a secondary consideration. This scoping review aims to identify themes in peer-reviewed studies that are related to the possible causation of sleep deprivation in competitive athletes.</p></div><div><h3>Method</h3><p>A scoping review was conducted using the PRISMA-ScR guideline. Three databases were used to research for the literature PubMed, Medline and EBSCO.</p></div><div><h3>Results</h3><p>After applying inclusion and exclusion criteria 16 peer-reviewed studies were identified. The studies were categorised into two sub-categories of short- and long-term causes of sleep deprivation. Five themes were identified: travel, night performance, prior, during and following competition and concussion.</p></div><div><h3>Conclusion</h3><p>The findings of this scoping review identified a number a short and long-term causes of sleep deprivation. The causes of the short-term causes can be addressed by implementing some simple interventions such as napping, relaxation techniques and sleep hygiene could aid an athlete performance. However, the long-term causes were linked to concussion, any intervention would need to be studied in greater detail and is beyond the remit of this scoping review.</p></div><div><h3>Objectif</h3><p>Un sommeil insuffisant a un impact négatif sur la santé psychologique et physiologique des athlètes d’élite. Des études ont montré qu’il existe une corrélation entre la privation de sommeil et une baisse des performances. Malgré l’intérêt croissant pour la science du sommeil, la recherche actuelle se concentre sur les résultats et la cause de la privation de sommeil est une considération secondaire. La présente étude de portée vise à identifier les thèmes des études évaluées par des pairs qui sont liés à la cause possible de la privation de sommeil chez les athlètes de compétition.</p></div><div><h3>Méthode</h3><p>Une étude de portée a été effectuée selon les règles PRISMA-ScR. Trois bases de données ont été utilisées pour la recherche de la littérature : PubMed, Medline et EBSCO.</p></div><div><h3>Résultats</h3><p>Après application des critères d’inclusion et d’exclusion, 16 études évaluées par des pairs ont été identifiées. Les études ont été classées en deux sous-catégories de causes à court et à long terme de la privation de sommeil. Cinq thèmes ont été identifiés: déplacement, performance nocturne, avant, pendant et après compétition et commotion cérébrale.</p></div><div><h3>Conclusion</h3><p>Les résultats de cette étude de portée ont identifié un certain nombre de causes à court et à long terme de la privation de sommeil. Les causes à court terme peuvent être traitées en mettant en œuvre des interven","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S076515972300240X/pdfft?md5=ee395d19ac377fb0b882a6363a14521a&pid=1-s2.0-S076515972300240X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139293710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1016/j.scispo.2023.12.001
K.J. Park
Objectives
This study sought to determine the relationship between the subjective evaluation of the low back pain scale and Modified Oswestry Disability Index (MODI) and the objective evaluation of muscle function and recovery period for elite Taekwondo players with back pain injuries.
Methods
The study included 57 elite Taekwondo athletes who participated in advanced competitions at a training camp for the year 2022. An independent-sample t-test was performed to compare the sex-specific measure of back pain, the MODI, muscle function, and recovery period. Pearson's correlation was used to investigate the relationship between variables, and simple linear regression analysis was performed to identify factors affecting variables. Statistical significance was set to α = 0.05, and all statistical analyses were performed with SPSS version 27.0 for Windows.
Results
Male athletes had a lower pain scale (3.41 vs. 4.86; P = 0.006) and MODI (14.03 vs. 20.75; P = 0.004) than female athletes but longer recovery period (8.66 vs. 6.21; P = 0.033). Additionally, for all athletes, the pain scale and MODI affected the left/right rotation ratio (P < 0.001, P = 0.005, respectively) and the recovery period (P < 0.001, P = 0.001, respectively), and, as the pain score and MODI increased, the left/right rotation ratio and recovery period also increased.
Conclusion
For all Taekwondo athletes, the pain score and MODI affected the ratio of the left/right rotation and recovery period. Therefore, it is necessary to develop an exercise program to alleviate the left/right rotation imbalance of Taekwondo athletes.
{"title":"Comparison of subjective and objective evaluation of back injuries of elite taekwondo athletes","authors":"K.J. Park","doi":"10.1016/j.scispo.2023.12.001","DOIUrl":"10.1016/j.scispo.2023.12.001","url":null,"abstract":"<div><h3>Objectives</h3><p>This study sought to determine the relationship between the subjective evaluation of the low back pain scale and Modified Oswestry Disability Index (MODI) and the objective evaluation of muscle function and recovery period for elite Taekwondo players with back pain injuries.</p></div><div><h3>Methods</h3><p>The study included 57 elite Taekwondo athletes who participated in advanced competitions at a training camp for the year 2022. An independent-sample <em>t</em>-test was performed to compare the sex-specific measure of back pain, the MODI, muscle function, and recovery period. Pearson's correlation was used to investigate the relationship between variables, and simple linear regression analysis was performed to identify factors affecting variables. Statistical significance was set to α<!--> <!-->=<!--> <!-->0.05, and all statistical analyses were performed with SPSS version 27.0 for Windows.</p></div><div><h3>Results</h3><p>Male athletes had a lower pain scale (3.41 vs. 4.86; <em>P</em> <!-->=<!--> <!-->0.006) and MODI (14.03 vs. 20.75; <em>P</em> <!-->=<!--> <!-->0.004) than female athletes but longer recovery period (8.66 vs. 6.21; <em>P</em> <!-->=<!--> <!-->0.033). Additionally, for all athletes, the pain scale and MODI affected the left/right rotation ratio (<em>P</em> <!--><<!--> <!-->0.001, <em>P</em> <!-->=<!--> <!-->0.005, respectively) and the recovery period (<em>P</em> <!--><<!--> <!-->0.001, <em>P</em> <!-->=<!--> <!-->0.001, respectively), and, as the pain score and MODI increased, the left/right rotation ratio and recovery period also increased.</p></div><div><h3>Conclusion</h3><p>For all Taekwondo athletes, the pain score and MODI affected the ratio of the left/right rotation and recovery period. Therefore, it is necessary to develop an exercise program to alleviate the left/right rotation imbalance of Taekwondo athletes.</p></div>","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140462730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1016/j.scispo.2023.09.003
A. Crelerot, L. Magot, A. Cugerone, C. Blanc-Bisson, B. Aimé
Objectifs
L’insuffisance d’activité physique (AP) et la sédentarité sont des facteurs de risques de nombreuses maladies et sont associées à une augmentation de la mortalité. Le rôle du médecin généraliste est central dans le repérage de ces deux facteurs de risque pour intervenir précocement dans la modification des comportements. Il existe de nombreux outils de mesure de l’AP validés mais ils sont difficilement utilisables en consultation. Un questionnaire court, en deux questions, le Brief Physical Activity Assessment Tool (BPAAT) ou questionnaire de Marshall, a été validé, en anglais, versus accélérométrie. Notre étude avait pour but de comparer la capacité du test de Marshall (dans sa version française) à classer les patients en suffisamment ou insuffisamment actifs, par rapport aux tests IPAQ et le GPAQ. Les objectifs secondaires étaient, d’évaluer la faisabilité de ce repérage en pratique de soins primaires et de tester trois autres approches : une autoévaluation par le patient de son AP ; une question sur l’inscription dans un club ou une association sportive, une question de repérage rapide de la sédentarité.
Méthodes
Étude épidémiologique transversale comparant une évaluation par le médecin avec le questionnaire de Marshall et les questions des trois autres approches à un questionnaire autorempli contenant les questionnaires IPAQ et GPAQ.
Résultats
Quatre cents quatre-vingt-seize sujets ont été inclus. Le questionnaire de Marshall avec un seuil à trois permettait de classer correctement les patients en suffisamment actifs ou insuffisamment actifs avec 68,41 % de concordance par rapport à l’IPAQ, et avec 70,10 % de concordance par rapport au GPAQ. Une question d’autoévaluation de l’activité physique pourrait avoir une valeur discriminante proche du test de Marshall. Pour l’évaluation de la sédentarité, une simple question évaluant le niveau de sédentarité ressenti de 0 à 10 est utilisable en pratique. Les médecins étaient capables de repérer les patients insuffisamment actifs et/ou sédentaires dans plus du tiers de leurs consultations.
Objectives
Insufficient physical activity (PA) and physical inactivity are risk factors for many diseases and are associated with increased mortality. The role of the general practitioner is central in identifying these two risk factors in order to intervene early in behavior modification. There are many validated PA measurement tools but they are difficult to use in consultation. A short questionnaire, in two questions, the Brief Physical Activity Assessment Tool (BPAAT) or Marshall questionnaire, was validated, in English, versus accelerometry. Our study aimed to compare the ability of the Marshall test (in its French version) to classify patients as sufficiently or insufficiently active, compared to the IPAQ and GPAQ tests. The secondary objectives were to assess the feasibility of this screening in primary care pr
{"title":"Validité d’un outil de repérage rapide de l’insuffisance d’activité physique et de la sédentarité en médecine générale","authors":"A. Crelerot, L. Magot, A. Cugerone, C. Blanc-Bisson, B. Aimé","doi":"10.1016/j.scispo.2023.09.003","DOIUrl":"10.1016/j.scispo.2023.09.003","url":null,"abstract":"<div><h3>Objectifs</h3><p>L’insuffisance d’activité physique (AP) et la sédentarité sont des facteurs de risques de nombreuses maladies et sont associées à une augmentation de la mortalité. Le rôle du médecin généraliste est central dans le repérage de ces deux facteurs de risque pour intervenir précocement dans la modification des comportements. Il existe de nombreux outils de mesure de l’AP validés mais ils sont difficilement utilisables en consultation. Un questionnaire court, en deux questions, le Brief Physical Activity Assessment Tool (BPAAT) ou questionnaire de Marshall, a été validé, en anglais, versus accélérométrie. Notre étude avait pour but de comparer la capacité du test de Marshall (dans sa version française) à classer les patients en suffisamment ou insuffisamment actifs, par rapport aux tests IPAQ et le GPAQ. Les objectifs secondaires étaient, d’évaluer la faisabilité de ce repérage en pratique de soins primaires et de tester trois autres approches : une autoévaluation par le patient de son AP ; une question sur l’inscription dans un club ou une association sportive, une question de repérage rapide de la sédentarité.</p></div><div><h3>Méthodes</h3><p>Étude épidémiologique transversale comparant une évaluation par le médecin avec le questionnaire de Marshall et les questions des trois autres approches à un questionnaire autorempli contenant les questionnaires IPAQ et GPAQ.</p></div><div><h3>Résultats</h3><p>Quatre cents quatre-vingt-seize sujets ont été inclus. Le questionnaire de Marshall avec un seuil à trois permettait de classer correctement les patients en suffisamment actifs ou insuffisamment actifs avec 68,41 % de concordance par rapport à l’IPAQ, et avec 70,10 % de concordance par rapport au GPAQ. Une question d’autoévaluation de l’activité physique pourrait avoir une valeur discriminante proche du test de Marshall. Pour l’évaluation de la sédentarité, une simple question évaluant le niveau de sédentarité ressenti de 0 à 10 est utilisable en pratique. Les médecins étaient capables de repérer les patients insuffisamment actifs et/ou sédentaires dans plus du tiers de leurs consultations.</p></div><div><h3>Objectives</h3><p>Insufficient physical activity (PA) and physical inactivity are risk factors for many diseases and are associated with increased mortality. The role of the general practitioner is central in identifying these two risk factors in order to intervene early in behavior modification. There are many validated PA measurement tools but they are difficult to use in consultation. A short questionnaire, in two questions, the Brief Physical Activity Assessment Tool (BPAAT) or Marshall questionnaire, was validated, in English, versus accelerometry. Our study aimed to compare the ability of the Marshall test (in its French version) to classify patients as sufficiently or insufficiently active, compared to the IPAQ and GPAQ tests. The secondary objectives were to assess the feasibility of this screening in primary care pr","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141142161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1016/j.scispo.2023.04.010
Y. Wang , B. Fu , Y. Gao
Background
This study aimed to determine the effects of high-altitude living low-altitude training on the athletic performance and metabolic indexes of adolescent boxers by using a hypobaric cabin to simulate hypoxia in high-altitude environments.
Methods
Male adolescent boxers (n = 16; control: n = 8, living and training at low altitude [LOLO]; experimental: n = 8, living at high altitude and training at low altitude [HILO]). The study period was 5 weeks (35 days) for both groups: baseline, week 1, week 2, week 3, week 4, and week 5 (post-training) representing the time point prior to, the first week, second week, third week, fourth week, and the week after training. Participants in the experimental group, slept in a high-altitude environment (2000m) simulated using an altitude-training hypobaric cabin. Blood indexes (erythrocyte count, hemoglobin, hematocrit, blood urea, creatine kinase), functional indexes (longitudinal jump, grip strength, eyes-closed one-foot standing, selective reaction time, 30-second sit-ups, 30-second push-ups, 30-second squats), and endurance indexes (lactate threshold, power) were assessed.
Results
In the HILO group, with respect to baseline, erythrocyte count, hemoglobin level, and hematocrit level increased (week 1); hemoglobin level remained high (week 2), decreased (week 3), and increased (week 4). Blood urea concentration increased to 6.11 ± 0.59 mmol/L in week 2 (P < 0.05); creatine kinase concentration increased to 310.75 ± 112. 21 U/L in week 3 (P < 0.01). Upper and lower limb strength increased in week 5, while the number of squats performed in 30 seconds (lower limb strength) decreased 6.87% in week 4 (P < 0.05), and the grip strength (upper limb strength) decreased 11.35% in week 4 (P < 0.05). The lactate threshold of the experimental group increased.
Conclusion
Adolescent boxers who lived in high-altitude conditions and trained in low-altitude conditions for 4 weeks exhibited improved blood oxygen transport capacity, upper limb strength, and speed endurance, which indicate that exercise ability improved.
Objectifs
Cette étude visait à déterminer les effets d’un entraînement en haute altitude et en basse altitude sur les performances athlétiques et les indices métaboliques d’adolescents boxeurs en utilisant une cabine hypobare pour simuler l’hypoxie dans des environnements de haute altitude.
Méthodes
Seize boxeurs adolescents de sexe masculin, dont 8 du groupe contrôle, vivant et s’entraînant en basse altitude [LOLO], 8 dans le groupe expérimental, vivant en haute altitude et s’entraînant en basse altitude [HILO]). La période d’étude était de 5
{"title":"Effects of simulated high-altitude living low-altitude training on the exercise abilities of adolescent boxers","authors":"Y. Wang , B. Fu , Y. Gao","doi":"10.1016/j.scispo.2023.04.010","DOIUrl":"10.1016/j.scispo.2023.04.010","url":null,"abstract":"<div><h3>Background</h3><p>This study aimed to determine the effects of high-altitude living low-altitude training on the athletic performance and metabolic indexes of adolescent boxers by using a hypobaric cabin to simulate hypoxia in high-altitude environments.</p></div><div><h3>Methods</h3><p>Male adolescent boxers (<em>n</em> <!-->=<!--> <!-->16; control: <em>n</em> <!-->=<!--> <!-->8, living and training at low altitude [LOLO]; experimental: <em>n</em> <!-->=<!--> <!-->8, living at high altitude and training at low altitude [HILO]). The study period was 5 weeks (35 days) for both groups: baseline, week 1, week 2, week 3, week 4, and week 5 (post-training) representing the time point prior to, the first week, second week, third week, fourth week, and the week after training. Participants in the experimental group, slept in a high-altitude environment (2000m) simulated using an altitude-training hypobaric cabin. Blood indexes (erythrocyte count, hemoglobin, hematocrit, blood urea, creatine kinase), functional indexes (longitudinal jump, grip strength, eyes-closed one-foot standing, selective reaction time, 30-second sit-ups, 30-second push-ups, 30-second squats), and endurance indexes (lactate threshold, power) were assessed.</p></div><div><h3>Results</h3><p>In the HILO group, with respect to baseline, erythrocyte count, hemoglobin level, and hematocrit level increased (week 1); hemoglobin level remained high (week 2), decreased (week 3), and increased (week 4). Blood urea concentration increased to 6.11<!--> <!-->±<!--> <!-->0.59 mmol/L in week 2 (<em>P</em> <!--><<!--> <!-->0.05); creatine kinase concentration increased to 310.75<!--> <!-->±<!--> <!-->112. 21 U/L in week 3 (<em>P</em> <!--><<!--> <!-->0.01). Upper and lower limb strength increased in week 5, while the number of squats performed in 30<!--> <!-->seconds (lower limb strength) decreased 6.87% in week 4 (<em>P</em> <!--><<!--> <!-->0.05), and the grip strength (upper limb strength) decreased 11.35% in week 4 (<em>P</em> <!--><<!--> <!-->0.05). The lactate threshold of the experimental group increased.</p></div><div><h3>Conclusion</h3><p>Adolescent boxers who lived in high-altitude conditions and trained in low-altitude conditions for 4 weeks exhibited improved blood oxygen transport capacity, upper limb strength, and speed endurance, which indicate that exercise ability improved.</p></div><div><h3>Objectifs</h3><p>Cette étude visait à déterminer les effets d’un entraînement en haute altitude et en basse altitude sur les performances athlétiques et les indices métaboliques d’adolescents boxeurs en utilisant une cabine hypobare pour simuler l’hypoxie dans des environnements de haute altitude.</p></div><div><h3>Méthodes</h3><p>Seize boxeurs adolescents de sexe masculin, dont 8 du groupe contrôle, vivant et s’entraînant en basse altitude [LOLO], 8 dans le groupe expérimental, vivant en haute altitude et s’entraînant en basse altitude [HILO]). La période d’étude était de 5","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141141328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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