Pub Date : 2024-01-01Epub Date: 2022-06-21DOI: 10.1080/15438627.2022.2090253
Matheus S Aguiar, Rafael Pereira, Alexander J Koch, Marco Machado
The purpose of this study was to test whether believed versus actual acute creatine ingestion impacted resistance exercise performance. Fifteen men (21.9 ± 2.7 years old) completed four bouts of three sets each of squat and bench press to volitional fatigue at a 10RM load with 1-min between-sets rest interval. Thirty minutes prior to each exercise bout, they received the following treatments in a randomized order: 1) nothing (CON); 2) 0.3 g·kg-1 dextrose placebo (PLC); 3) 0.3 g·kg-1 dextrose, identified as creatine (Cr-False); 4) 0.3 g·kg 20 -1 creatine, identified as creatine (CrTrue). Between-treatments comparisons included the total repetitions completed and the rate of perceived exertion. Results revealed (p < 0.05) higher repetitions performed for all treatments versus CON for both squat and bench press. In the squat, more repetitions were performed with Cr-True (p < 0.001) and CrFalse (p < 0.001) than with either CON or PLC. Bayes Factor analyses revealed strong (PLC to Cr-True BF = 19.1) and very strong (PLC to CrFalse BF = 45.3) posterior probability favouring positive effects for both "creatine" conditions over PLC for the squat. In conclusion, in acute measures, belief versus ingestion of creatine yields similar exercise performance.
{"title":"Psychological effect of acute creatine pre-workout supplementation induces performance improvement in resistance exercise.","authors":"Matheus S Aguiar, Rafael Pereira, Alexander J Koch, Marco Machado","doi":"10.1080/15438627.2022.2090253","DOIUrl":"10.1080/15438627.2022.2090253","url":null,"abstract":"<p><p>The purpose of this study was to test whether believed versus actual acute creatine ingestion impacted resistance exercise performance. Fifteen men (21.9 ± 2.7 years old) completed four bouts of three sets each of squat and bench press to volitional fatigue at a 10RM load with 1-min between-sets rest interval. Thirty minutes prior to each exercise bout, they received the following treatments in a randomized order: 1) nothing (CON); 2) 0.3 g·kg-1 dextrose placebo (PLC); 3) 0.3 g·kg-1 dextrose, identified as creatine (Cr-False); 4) 0.3 g·kg 20 -1 creatine, identified as creatine (CrTrue). Between-treatments comparisons included the total repetitions completed and the rate of perceived exertion. Results revealed (p < 0.05) higher repetitions performed for all treatments versus CON for both squat and bench press. In the squat, more repetitions were performed with Cr-True (p < 0.001) and CrFalse (p < 0.001) than with either CON or PLC. Bayes Factor analyses revealed strong (PLC to Cr-True BF = 19.1) and very strong (PLC to CrFalse BF = 45.3) posterior probability favouring positive effects for both \"creatine\" conditions over PLC for the squat. In conclusion, in acute measures, belief versus ingestion of creatine yields similar exercise performance.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40121929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-10-31DOI: 10.1080/15438627.2022.2132862
Hannah E Cintron, Jessica J Heyburn, Robert L Sterner, Scott J Dankel
The objective of this study was to determine if performing electrical stimulations (E-STIM) under blood flow restriction (BFR) would result in a greater protective effect against symptoms of muscle damage. 18 individuals (9 females) completed a damaging bout of exercise followed by a low frequency E-STIM treatment protocol on both arms, one of which was completed under BFR. The treatment protocol was then repeated 24-hours post-exercise. There were main effects of time for muscle thickness (pre: 3.5 cm; 48 h post: 3.8 cm; BF10 = 88.476), discomfort (pre: 0.0 au; 48 h post: 4.2 au; BF10 = 241.996), and isometric strength (pre: 278 N; 48 h post: 232 N; BF10 = 10,289.894) which all changed as a result of the damaging exercise protocol, but there were no differences between conditions [all Bayes Factors (BF10) < 0.28]. The effectiveness of low frequency E-STIM for preventing the onset of exercise-induced muscle damage would not appear to be enhanced if performed under BFR.
{"title":"Blood Flow Restricted Electrical Stimulations to Prevent or Attenuate Symptoms of Muscle Damage.","authors":"Hannah E Cintron, Jessica J Heyburn, Robert L Sterner, Scott J Dankel","doi":"10.1080/15438627.2022.2132862","DOIUrl":"10.1080/15438627.2022.2132862","url":null,"abstract":"<p><p>The objective of this study was to determine if performing electrical stimulations (E-STIM) under blood flow restriction (BFR) would result in a greater protective effect against symptoms of muscle damage. 18 individuals (9 females) completed a damaging bout of exercise followed by a low frequency E-STIM treatment protocol on both arms, one of which was completed under BFR. The treatment protocol was then repeated 24-hours post-exercise. There were main effects of time for muscle thickness (pre: 3.5 cm; 48 h post: 3.8 cm; BF<sub>10</sub> = 88.476), discomfort (pre: 0.0 au; 48 h post: 4.2 au; BF<sub>10</sub> = 241.996), and isometric strength (pre: 278 N; 48 h post: 232 N; BF<sub>10</sub> = 10,289.894) which all changed as a result of the damaging exercise protocol, but there were no differences between conditions [all Bayes Factors (BF<sub>10</sub>) < 0.28]. The effectiveness of low frequency E-STIM for preventing the onset of exercise-induced muscle damage would not appear to be enhanced if performed under BFR.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40436568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-06-01DOI: 10.1080/15438627.2022.2079984
James Siddle, Kristian Weaver, Matt Greig, Damian Harper, Christopher Michael Brogden
Nordic hamstring curls (NHC) are a commonly used injury intervention method in amateur team sports. Seventeen elite male academy soccer players performed an 8-week low volume NHC programme. Pre-post intervention measures of isokinetic eccentric knee flexor (KF) strength, linear speed, COD performance, hamstring muscle thickness, pennation angle and fascicle length were recorded. No significant main effects were observed for measures of isokinetic KF strength (P ≥ 0.19), linear sprint speed (P ≥ 0.47) or hamstring muscle architecture (P ≥ 0.30). However, significance was noted for improved COD performance (P < 0.01; mean difference, -0.06, p = 0.001, 95% CI = 0.03 to 0.09; d = 0.80), exceeding the minimal detectable difference (MDD = 0.05 s). A low-volume NHC intervention may contribute to significant improvements in COD ability, independent of no significant changes in eccentric KF strength, linear sprint speed or muscle architectural properties in elite youth soccer players.
{"title":"A low-volume Nordic hamstring curl programme improves change of direction ability, despite no architectural, strength or speed adaptations in elite youth soccer players.","authors":"James Siddle, Kristian Weaver, Matt Greig, Damian Harper, Christopher Michael Brogden","doi":"10.1080/15438627.2022.2079984","DOIUrl":"10.1080/15438627.2022.2079984","url":null,"abstract":"<p><p>Nordic hamstring curls (NHC) are a commonly used injury intervention method in amateur team sports. Seventeen elite male academy soccer players performed an 8-week low volume NHC programme. Pre-post intervention measures of isokinetic eccentric knee flexor (KF) strength, linear speed, COD performance, hamstring muscle thickness, pennation angle and fascicle length were recorded. No significant main effects were observed for measures of isokinetic KF strength (P ≥ 0.19), linear sprint speed (P ≥ 0.47) or hamstring muscle architecture (P ≥ 0.30). However, significance was noted for improved COD performance (P < 0.01; mean difference, -0.06, p = 0.001, 95% CI = 0.03 to 0.09; <i>d </i>= 0.80), exceeding the minimal detectable difference (MDD = 0.05 s). A low-volume NHC intervention may contribute to significant improvements in COD ability, independent of no significant changes in eccentric KF strength, linear sprint speed or muscle architectural properties in elite youth soccer players.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90753780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-06-21DOI: 10.1080/15438627.2022.2090252
Yu Tian, Bing He, Alexandr Tsymbal
The research aims to increase the efficiency of the training process for young tennis players old based on lateral epicondylitis secondary prevention methods. Tennis players with apparent residual effects of lateral epicondylitis were selected for the study and divided into experimental (18 boys and 14 girls) and control groups (18 boys and 13 girls). The experimental group was trained according to the developed technique, and the control group as per standard one. The results of goniometry in the experimental group showed the normalization of the motion amplitude in extension and supination. The motor density of the training session applying the complex technique for the secondary prevention of lateral epicondylitis in the experimental group increased on average from 66.6% to 82.2% in boys and from 65.7% to 80.0% in girls.
{"title":"Comprehensive secondary prevention of lateral epicondylitis in young tennis players.","authors":"Yu Tian, Bing He, Alexandr Tsymbal","doi":"10.1080/15438627.2022.2090252","DOIUrl":"10.1080/15438627.2022.2090252","url":null,"abstract":"<p><p>The research aims to increase the efficiency of the training process for young tennis players old based on lateral epicondylitis secondary prevention methods. Tennis players with apparent residual effects of lateral epicondylitis were selected for the study and divided into experimental (18 boys and 14 girls) and control groups (18 boys and 13 girls). The experimental group was trained according to the developed technique, and the control group as per standard one. The results of goniometry in the experimental group showed the normalization of the motion amplitude in extension and supination. The motor density of the training session applying the complex technique for the secondary prevention of lateral epicondylitis in the experimental group increased on average from 66.6% to 82.2% in boys and from 65.7% to 80.0% in girls.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40122078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-05-27DOI: 10.1080/15438627.2022.2079981
Jamie S Brown, Ola Olsson, Anders Isacsson, Martin Englund
Sensitivity, specificity, and agreement between clinical and magnetic resonance imaging (MRI) gradings of the medial collateral ligament (MCL) after acute knee injury were evaluated in 362 patients. Ninety-seven per cent were injured during sports/recreation. Sensitivity and specificity of MRI for grade II or III MCL injury was 68% (95% CI 58-77%) and 90% (95% CI 86-93%), respectively. Weighted Kappa analysis showed moderate agreement between clinical and MRI grading (0.56 [95% CI 0.48-0.65]). Findings were similar for patients with and without concomitant cruciate ligament rupture (0.57 [95% CI 0.48-0.66] and 0.55 [95% CI 0.35-0.75], respectively) and for specialists in orthopaedics and knee sub-specialists (0.55 [95% CI 0.39-0.70] and 0.57 [95% CI 0.47-0.67], respectively). Agreement between clinical and MRI grading of MCL injuries by orthopaedic specialists in a general hospital is at least moderate regardless of the presence of cruciate ligament injury.
我们对 362 名患者急性膝关节损伤后内侧副韧带(MCL)的敏感性、特异性以及临床与磁共振成像(MRI)分级之间的一致性进行了评估。97%的患者是在运动/娱乐过程中受伤的。MRI 对 II 级或 III 级 MCL 损伤的敏感性和特异性分别为 68%(95% CI 58-77%)和 90%(95% CI 86-93%)。加权卡帕分析表明,临床分级与 MRI 分级之间存在一定的一致性(0.56 [95% CI 0.48-0.65])。对于伴有和不伴有十字韧带断裂的患者(分别为 0.57 [95% CI 0.48-0.66] 和 0.55 [95% CI 0.35-0.75]),以及骨科专家和膝关节亚专科专家(分别为 0.55 [95% CI 0.39-0.70] 和 0.57 [95% CI 0.47-0.67]),结果相似。无论是否存在十字韧带损伤,综合医院骨科专家对 MCL 损伤的临床分级和 MRI 分级之间的一致性至少为中等。
{"title":"Clinical versus MRI grading of the medial collateral ligament in acute knee injury.","authors":"Jamie S Brown, Ola Olsson, Anders Isacsson, Martin Englund","doi":"10.1080/15438627.2022.2079981","DOIUrl":"10.1080/15438627.2022.2079981","url":null,"abstract":"<p><p>Sensitivity, specificity, and agreement between clinical and magnetic resonance imaging (MRI) gradings of the medial collateral ligament (MCL) after acute knee injury were evaluated in 362 patients. Ninety-seven per cent were injured during sports/recreation. Sensitivity and specificity of MRI for grade II or III MCL injury was 68% (95% CI 58-77%) and 90% (95% CI 86-93%), respectively. Weighted Kappa analysis showed moderate agreement between clinical and MRI grading (0.56 [95% CI 0.48-0.65]). Findings were similar for patients with and without concomitant cruciate ligament rupture (0.57 [95% CI 0.48-0.66] and 0.55 [95% CI 0.35-0.75], respectively) and for specialists in orthopaedics and knee sub-specialists (0.55 [95% CI 0.39-0.70] and 0.57 [95% CI 0.47-0.67], respectively). Agreement between clinical and MRI grading of MCL injuries by orthopaedic specialists in a general hospital is at least moderate regardless of the presence of cruciate ligament injury.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83294941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-05-26DOI: 10.1080/15438627.2022.2079989
Javier Sánchez-Sánchez, Luis Torres Martín, Rodrigo Ramirez-Campillo, Daniel Castillo, Javier Raya-González
This study aimed to analyse the effects of a 16-week jump training program on the physical performance and lower extremities injury profile in semi-professional male soccer players. Participants were randomly assigned to the control group (CG; n = 13; age = 21.7 ± 3.6 years) or the experimental group (EG; n = 10; age = 22.3 ± 3.5 years). Countermovement jump (CMJ) height (cm), 30 m linear sprint time (s) with split times at 10 m and 20 m distances, and change of direction speed (CODS; 10 + 10 m with 90° turn) time (s) with turns using the dominant or non-dominant leg, were assessed before and after the intervention. Lower extremity injuries sustained throughout the intervention period were collected. Significant within-group improvements were found in EG in CMJ (p = 0.01; effect size [ES] = 1.03; large). Additionally, between-group difference after intervention was found in CMJ (F = 4.42; p = 0.013) in favour of EG. Injury burden was 194.86 (CG) vs 71.37 (EG) days of absence/1,000 h (RR = 2.73; 95% CI 2.10-3.54; p < 0.001). No other significant within-group or between-group differences were found. In conclusion, compared to regular soccer training, jump training was effective to improve jumping ability and burden in soccer players.
{"title":"The effects of jump training on measures of physical performance, lower extremities injury incidence and burden in highly trained male soccer players.","authors":"Javier Sánchez-Sánchez, Luis Torres Martín, Rodrigo Ramirez-Campillo, Daniel Castillo, Javier Raya-González","doi":"10.1080/15438627.2022.2079989","DOIUrl":"10.1080/15438627.2022.2079989","url":null,"abstract":"<p><p>This study aimed to analyse the effects of a 16-week jump training program on the physical performance and lower extremities injury profile in semi-professional male soccer players. Participants were randomly assigned to the control group (CG; n = 13; age = 21.7 ± 3.6 years) or the experimental group (EG; n = 10; age = 22.3 ± 3.5 years). Countermovement jump (CMJ) height (cm), 30 m linear sprint time (s) with split times at 10 m and 20 m distances, and change of direction speed (CODS; 10 + 10 m with 90° turn) time (s) with turns using the dominant or non-dominant leg, were assessed before and after the intervention. Lower extremity injuries sustained throughout the intervention period were collected. Significant within-group improvements were found in EG in CMJ (p = 0.01; effect size [ES] = 1.03; large). Additionally, between-group difference after intervention was found in CMJ (F = 4.42; p = 0.013) in favour of EG. Injury burden was 194.86 (CG) vs 71.37 (EG) days of absence/1,000 h (RR = 2.73; 95% CI 2.10-3.54; p < 0.001). No other significant within-group or between-group differences were found. In conclusion, compared to regular soccer training, jump training was effective to improve jumping ability and burden in soccer players.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82435428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-05-29DOI: 10.1080/15438627.2022.2079986
Jihong Qiu, Tianzhi Jiang, Michael Tim-Yun Ong, Xin He, Chi-Yin Choi, Sai-Chuen Fu, Daniel T P Fong, Patrick Shu-Hang Yung
The study aimed to investigate the impairments in quadriceps neuromuscular function, including strength, rate of torque development (RTD) and activation failure (QAF) early after an ACL injury. A cross-sectional study was conducted. Thirty physically active patients with a primary ACL injury within three months, aged 18 to 40 years old, and who were scheduled for ACL reconstruction were included. Thirty matched healthy controls were also recruited. All the outcomes were measured on an isokinetic dynamometer with knee flexion at 45°. Quadriceps strength was measured by maximal voluntary isometric contractions (MVIC). Early (RTD0-50) and late (RTD100-200) phases of RTD were retrieved from the MVIC test from 0 to 50 ms and 100-200 ms, respectively. QAF was quantified by the central activation ratio (CAR) measured by superimposed burst technique. The results of Mann-Whitney U test showed that compared with the healthy limbs, the injured limbs of the ACL group showed lower quadriceps strength (P < 0.001), RTD0-50 (P < 0.001) and RTD100-200 (P < 0.001); the uninjured limbs showed lower quadriceps strength (P = 0.009), RTD0-50 (P = 0.006) as well as greater QAF (P = 0.010). To conclude, bilateral quadriceps suffered from neuromuscular impairments early after an ACL injury.
{"title":"Bilateral impairments of quadriceps neuromuscular function occur early after anterior cruciate ligament injury.","authors":"Jihong Qiu, Tianzhi Jiang, Michael Tim-Yun Ong, Xin He, Chi-Yin Choi, Sai-Chuen Fu, Daniel T P Fong, Patrick Shu-Hang Yung","doi":"10.1080/15438627.2022.2079986","DOIUrl":"10.1080/15438627.2022.2079986","url":null,"abstract":"<p><p>The study aimed to investigate the impairments in quadriceps neuromuscular function, including strength, rate of torque development (RTD) and activation failure (QAF) early after an ACL injury. A cross-sectional study was conducted. Thirty physically active patients with a primary ACL injury within three months, aged 18 to 40 years old, and who were scheduled for ACL reconstruction were included. Thirty matched healthy controls were also recruited. All the outcomes were measured on an isokinetic dynamometer with knee flexion at 45°. Quadriceps strength was measured by maximal voluntary isometric contractions (MVIC). Early (RTD<sub>0-50</sub>) and late (RTD<sub>100-200</sub>) phases of RTD were retrieved from the MVIC test from 0 to 50 ms and 100-200 ms, respectively. QAF was quantified by the central activation ratio (CAR) measured by superimposed burst technique. The results of Mann-Whitney U test showed that compared with the healthy limbs, the injured limbs of the ACL group showed lower quadriceps strength (P < 0.001), RTD<sub>0-50</sub> (P < 0.001) and RTD<sub>100-200</sub> (P < 0.001); the uninjured limbs showed lower quadriceps strength (P = 0.009), RTD<sub>0-50</sub> (P = 0.006) as well as greater QAF (P = 0.010). To conclude, bilateral quadriceps suffered from neuromuscular impairments early after an ACL injury.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77645665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-05-24DOI: 10.1080/15438627.2022.2079987
Danica Janicijevic, Beatriz Redondo, Raimundo Jiménez, Amador Garcia-Ramos, Jesus Vera
This study aimed to determine the influence of physical fitness level and sex on intraocular pressure (IOP) during the low-intensity aerobic exercise. Forty-four participants (twenty-two men) cycled 30 minutes at low intensity (10% of the maximal power). Maximal power was determined by asking participants to perform maximal sprints of 6 seconds against 3-4 different resistances separated by 3 minutes of rest. The IOP was measured on 9 occasions (1) prior to the warm-up, (2) after the warm-up, (3-7) every 6 minutes during the low-intensity cycling task, and (8-9) 5 and 10 minutes after the cycling task. Low-intensity aerobic exercise had a lowering effect on IOP, being the beneficial effect more accentuated and prolonged in the High-fit group (IOP reduction compared to baseline lasted 30 minutes) than in the Low-fit group (IOP was only reduced at 6 minutes of exercise compared to baseline). Participants´ sex had no effect on the IOP behaviour at any time point (p = 0.453). These findings indicate that individuals who need to reduce IOP levels (i.e., glaucoma patients or those at risk) should increase or maintain a high fitness level to benefit more from the IOP lowering effect during low-intensity aerobic exercises.
{"title":"The intraocular pressure lowering-effect of low-intensity aerobic exercise is greater in fitter individuals: a cluster analysis.","authors":"Danica Janicijevic, Beatriz Redondo, Raimundo Jiménez, Amador Garcia-Ramos, Jesus Vera","doi":"10.1080/15438627.2022.2079987","DOIUrl":"10.1080/15438627.2022.2079987","url":null,"abstract":"<p><p>This study aimed to determine the influence of physical fitness level and sex on intraocular pressure (IOP) during the low-intensity aerobic exercise. Forty-four participants (twenty-two men) cycled 30 minutes at low intensity (10% of the maximal power). Maximal power was determined by asking participants to perform maximal sprints of 6 seconds against 3-4 different resistances separated by 3 minutes of rest. The IOP was measured on 9 occasions (1) prior to the warm-up, (2) after the warm-up, (3-7) every 6 minutes during the low-intensity cycling task, and (8-9) 5 and 10 minutes after the cycling task. Low-intensity aerobic exercise had a lowering effect on IOP, being the beneficial effect more accentuated and prolonged in the High-fit group (IOP reduction compared to baseline lasted 30 minutes) than in the Low-fit group (IOP was only reduced at 6 minutes of exercise compared to baseline). Participants´ sex had no effect on the IOP behaviour at any time point (p = 0.453). These findings indicate that individuals who need to reduce IOP levels (i.e., glaucoma patients or those at risk) should increase or maintain a high fitness level to benefit more from the IOP lowering effect during low-intensity aerobic exercises.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89663170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-05-27DOI: 10.1080/15438627.2022.2079983
Aline M Araujo, Rafael B Orcy, Natan Feter, Marina K Weymar, Rodrigo K Cardoso, Maristela Bohlke, Airton J Rombaldi
The study aimed to investigate the effect of intradialytic exercise training programmes on the submaximal functional capacity of patients with kidney failure. We searched for randomized clinical trials that assessed submaximal functional capacity using the 6-min walk test (6 MWT) in adult patients on maintenance haemodialysis submitted to intradialytic physical training. The search was performed on 15 October 2021, in different databases. Random-effect, multivariate meta-regression adjusted for multiplicity were performed to examine the relationship between exercise effect and covariates. Intradialytic physical exercise induced greater changes in 6MWT distance (k = 18; n = 1,458; WMD: 37.0; 95% CI 29.3; 50.6 metres) than control groups, with substantial heterogeneity (I2 = 78.3%). Aerobic, strength, and combined exercise promoted an average increase of 48.7 (95%CI 30.9; 66.4 metres), 16.9 (95%CI 7.6; 26.3 metres), and 75.8 (95%CI 55.1; 96.6 metres) metres, respectively. Strength training resulted in inferior gains in 6MWT distance compared to aerobic training (WMD: -25.0; 95%CI: -49.1; -0.9). Intervention length shorter than 11 weeks (WMD: 37.0; 95%CI: -5.4; 79.3 metres) did not induce greater changes in 6MWT compared to control groups. There was a positive response in submaximal functional capacity to intradialytic training in kidney failure patients on maintenance haemodialysis.
{"title":"Effects of intradialytic exercise on functional capacity in patients with end-stage chronic kidney disease: a systematic review and meta-analysis.","authors":"Aline M Araujo, Rafael B Orcy, Natan Feter, Marina K Weymar, Rodrigo K Cardoso, Maristela Bohlke, Airton J Rombaldi","doi":"10.1080/15438627.2022.2079983","DOIUrl":"10.1080/15438627.2022.2079983","url":null,"abstract":"<p><p>The study aimed to investigate the effect of intradialytic exercise training programmes on the submaximal functional capacity of patients with kidney failure. We searched for randomized clinical trials that assessed submaximal functional capacity using the 6-min walk test (6 MWT) in adult patients on maintenance haemodialysis submitted to intradialytic physical training. The search was performed on 15 October 2021, in different databases. Random-effect, multivariate meta-regression adjusted for multiplicity were performed to examine the relationship between exercise effect and covariates. Intradialytic physical exercise induced greater changes in 6MWT distance (k = 18; n = 1,458; WMD: 37.0; 95% CI 29.3; 50.6 metres) than control groups, with substantial heterogeneity (I2 = 78.3%). Aerobic, strength, and combined exercise promoted an average increase of 48.7 (95%CI 30.9; 66.4 metres), 16.9 (95%CI 7.6; 26.3 metres), and 75.8 (95%CI 55.1; 96.6 metres) metres, respectively. Strength training resulted in inferior gains in 6MWT distance compared to aerobic training (WMD: -25.0; 95%CI: -49.1; -0.9). Intervention length shorter than 11 weeks (WMD: 37.0; 95%CI: -5.4; 79.3 metres) did not induce greater changes in 6MWT compared to control groups. There was a positive response in submaximal functional capacity to intradialytic training in kidney failure patients on maintenance haemodialysis.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87855702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-06-21DOI: 10.1080/15438627.2022.2090250
Vahid Giv, Mohsen Aminaei, Rohullah Nikoei
The purpose of the study investigated the effect of eight weeks of soccer training with beetroot juice supplement on aerobic power, anaerobic power, and field performance of soccer players. This is experimental research, by the control group in pre and post-test. The statistical population was male soccer players. Forty subjects were randomly divided into four groups including the exercise group (EX) the exercise group with beetroot juice supplement (EX&BRJS) the beetroot juice supplement group (BRJS), and the control group (C). Aerobic power, anaerobic threshold, and respiratory exchange ratio, measured by the gas analyser (Cosmed), anaerobic power (peak, mean power), and fatigue index, by Wingate cycle test (Monark, 839), and field performance by (Bangsbo, field test performance). The statistical methods include the Kolmogorov-Smirnov, Levin, covariance (ANCOVA), and pair comparison with Bonferroni test. The results showed eight weeks' of soccer training with beetroot juice supplement, significantly changed aerobic power, respiratory exchange ratio, anaerobic threshold, anaerobic power, field performance, and fatigue index (P ≤ 0.05). Additionally, in all variables, the paired comparison showed that the EX&BRJS group progressed more than all other condition groups. The soccer athletes may use beetroot juice supplements along with soccer exercises to improve aerobic and anaerobic power and field performance.
{"title":"The effect of eight weeks beetroot juice supplement on aerobic, anaerobic power, and field performance of soccer players.","authors":"Vahid Giv, Mohsen Aminaei, Rohullah Nikoei","doi":"10.1080/15438627.2022.2090250","DOIUrl":"10.1080/15438627.2022.2090250","url":null,"abstract":"<p><p>The purpose of the study investigated the effect of eight weeks of soccer training with beetroot juice supplement on aerobic power, anaerobic power, and field performance of soccer players. This is experimental research, by the control group in pre and post-test. The statistical population was male soccer players. Forty subjects were randomly divided into four groups including the exercise group (EX) the exercise group with beetroot juice supplement (EX&BRJS) the beetroot juice supplement group (BRJS), and the control group (C). Aerobic power, anaerobic threshold, and respiratory exchange ratio, measured by the gas analyser (Cosmed), anaerobic power (peak, mean power), and fatigue index, by Wingate cycle test (Monark, 839), and field performance by (Bangsbo, field test performance). The statistical methods include the Kolmogorov-Smirnov, Levin, covariance (ANCOVA), and pair comparison with Bonferroni test. The results showed eight weeks' of soccer training with beetroot juice supplement, significantly changed aerobic power, respiratory exchange ratio, anaerobic threshold, anaerobic power, field performance, and fatigue index (P ≤ 0.05). Additionally, in all variables, the paired comparison showed that the EX&BRJS group progressed more than all other condition groups. The soccer athletes may use beetroot juice supplements along with soccer exercises to improve aerobic and anaerobic power and field performance.</p>","PeriodicalId":20958,"journal":{"name":"Research in Sports Medicine","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40121927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}