Pub Date : 2020-12-31DOI: 10.21134/EURJHM.2020.45.9
Juan Antonio Escobar Álvarez, Rocío Carrasco-Zahínos, P. R. Olivares, S. Feu, R. Ramírez‐Vélez, M. P. Sousa
Agility is a key component of physical fitness in adolescents. However, the measurement of this variable is usually complex, requiring high cost instruments and complex software. To test the validity and reliability of a novel iPhone app (Lap Tracker Auto-timer) to measure agility performance among adolescents. Twenty-four physically active adolescents (15.7 ± 2.3 years old) participated in two testing sessions (separated by 7 days). They performed three 4 x 10 m agility test trials measured by Photocell or the iPhone app. The correlation analysis revealed high validity (r = .92; 95% confidence interval [CI] = .88 – .95), with a standard error of the estimate of 0.56 s (p < 0.001). The coefficient of variation (CV; 0.09) and intraclass correlation coefficient (ICC; .93; 95% CI = .85 – .97) showed an acceptable reliability. This study demonstrated that the iPhone App Lap Tracker Auto-timer could be a valid, reliable and low-cost tool to evaluate agility performance in adolescents. However, more studies are required to guarantee the utility of this app.
敏捷性是青少年身体健康的关键组成部分。然而，这个变量的测量通常是复杂的，需要高成本的仪器和复杂的软件。目的:测试一种新的iPhone应用程序(Lap Tracker Auto-timer)对青少年敏捷性表现的有效性和可靠性。24名身体活动的青少年(15.7±2.3岁)参加了两次测试(间隔7天)。他们通过Photocell或iPhone应用程序进行了3次4 x 10米敏捷性测试试验。相关分析显示高效度(r = 0.92;95%置信区间[CI] = 0.88 - 0.95)，估计标准误差为0.56 s (p < 0.001)。变异系数(CV;0.09)和类内相关系数(ICC;公布;95% CI = 0.85 - 0.97)显示可接受的信度。本研究表明，iPhone App Lap Tracker Auto-timer是一种有效、可靠、低成本的青少年敏捷性评估工具。然而，需要更多的研究来保证这个应用程序的实用性。
{"title":"The validity and reliability of a novel mobile app to measure agility performance in the physically active youth population","authors":"Juan Antonio Escobar Álvarez, Rocío Carrasco-Zahínos, P. R. Olivares, S. Feu, R. Ramírez‐Vélez, M. P. Sousa","doi":"10.21134/EURJHM.2020.45.9","DOIUrl":"https://doi.org/10.21134/EURJHM.2020.45.9","url":null,"abstract":"Agility is a key component of physical fitness in adolescents. However, the measurement of this variable is usually complex, requiring high cost instruments and complex software. To test the validity and reliability of a novel iPhone app (Lap Tracker Auto-timer) to measure agility performance among adolescents. Twenty-four physically active adolescents (15.7 ± 2.3 years old) participated in two testing sessions (separated by 7 days). They performed three 4 x 10 m agility test trials measured by Photocell or the iPhone app. The correlation analysis revealed high validity (r = .92; 95% confidence interval [CI] = .88 – .95), with a standard error of the estimate of 0.56 s (p < 0.001). The coefficient of variation (CV; 0.09) and intraclass correlation coefficient (ICC; .93; 95% CI = .85 – .97) showed an acceptable reliability. This study demonstrated that the iPhone App Lap Tracker Auto-timer could be a valid, reliable and low-cost tool to evaluate agility performance in adolescents. However, more studies are required to guarantee the utility of this app.","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"10 1","pages":"85-92"},"PeriodicalIF":0.5,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85629367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-31DOI: 10.21134/EURJHM.2020.45.1
J. Raya-González, A. Scanlan, Silvia Sánchez-Díaz, Daniel Castillo
Introduction: The increase in the number of participants of Ultimate Frisbee suggest the necessity to improve the knowledge about this sport and its demands. Thus, the aim of this study was to quantify and compare the external loads imposed upon players during official Ultimate Frisbee matches according to sex. Material and methods: Twelve male and female players participated in four official Ultimate Frisbee matches. Players were divided according to sex (8 males and 4 females). Results: The average duration of matches was 62.3 ± 13.8 min, during which the players were active for 34.9 ± 11.4 min. External loads (i.e., total distance covered, distance covered at different speeds, accelerations and decelerations) encountered by Ultimate Frisbee players were compared between sexes (males vs females). Male players registered greater external loads (p < 0.05 large-moderate), especially performing high-intensity actions (distance at high intensity, distance at very-high speeds, and medium-high accelerations and decelerations) than female players. Conclusions: Coaching and performance staff should consider the sex of each player when developing training programmes and tactical strategies to optimise player performance during Ultimate Frisbee matches.
{"title":"Sex-based differences in the external loads imposed during an official ultimate-frisbee competition: monitoring of ultimate-frisbee demands","authors":"J. Raya-González, A. Scanlan, Silvia Sánchez-Díaz, Daniel Castillo","doi":"10.21134/EURJHM.2020.45.1","DOIUrl":"https://doi.org/10.21134/EURJHM.2020.45.1","url":null,"abstract":"Introduction: The increase in the number of participants of Ultimate Frisbee suggest the necessity to improve the knowledge about this sport and its demands. Thus, the aim of this study was to quantify and compare the external loads imposed upon players during official Ultimate Frisbee matches according to sex. Material and methods: Twelve male and female players participated in four official Ultimate Frisbee matches. Players were divided according to sex (8 males and 4 females). Results: The average duration of matches was 62.3 ± 13.8 min, during which the players were active for 34.9 ± 11.4 min. External loads (i.e., total distance covered, distance covered at different speeds, accelerations and decelerations) encountered by Ultimate Frisbee players were compared between sexes (males vs females). Male players registered greater external loads (p < 0.05 large-moderate), especially performing high-intensity actions (distance at high intensity, distance at very-high speeds, and medium-high accelerations and decelerations) than female players. Conclusions: Coaching and performance staff should consider the sex of each player when developing training programmes and tactical strategies to optimise player performance during Ultimate Frisbee matches.","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"1 1","pages":"4-11"},"PeriodicalIF":0.5,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82935453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-31DOI: 10.21134/EURJHM.2020.45.2
Ricardo Ferraz, Luís Branquinho, Renata Loupo, H. Neiva, D. Marinho
The main aim of this study was to verify associations between the anthropometric characteristics of young swimmers of different genders and different competitive levels with sports performance in 50m and 400m freestyle races at different levels (U-13 - Swimmers A and U-12 - Swimmers B). In addition, it was also intended to investigate the magnitude of the correlations between some specific variables (i.e., height, weight and wingspan) and the swimming performance. All participants were analyzed, regarding their anthropometric characteristics and their performance in the 50m and 400m freestyle swim. A total of 98 swimmers aged between 11-13 years old (mean ± standard deviation: 12.63 ± 0.76 years of age, 1.59 ± 0.08m height, 47.11 ± 7.82kg body weight) participated in the study. The results suggest that anthropometric characteristics have a positive relationship in the performance of swimmers when comparing genders (p< 0,01), furthermore positive linear correlations was found in height (r = 0.305 and r = 0.253, p <0.01), weight (r = 0.202 and r = 0.140, p <0.01), and wingspan (r = 0.227 and r = 0.203, p < 0.01) for 50m and 400m freestyle swim. The swimmers’ efficiency of segmental movements was related to anthropometric characteristics and strongly associated with the length of the swimmers’ segments. These results may be due to the fact that swimmers’ maturational status may have played an important role, in the observed results. In addition, when comparing genders, the height and weight values of male swimmers tended to be higher. Furthermore, the differences observed in the 50m and 400m freestyle swimming events were related to the relationship that anthropometric characteristics have on the biomechanical parameters of swimming, which influence swimming performance. This study concluded that the improvement of performance of each young national-level swimmer is strongly related to the rate of growth, development and maturation.
{"title":"The relationship between anthropometric characteristics and sports performance in national-level young swimmers","authors":"Ricardo Ferraz, Luís Branquinho, Renata Loupo, H. Neiva, D. Marinho","doi":"10.21134/EURJHM.2020.45.2","DOIUrl":"https://doi.org/10.21134/EURJHM.2020.45.2","url":null,"abstract":"The main aim of this study was to verify associations between the anthropometric characteristics of young swimmers of different genders and different competitive levels with sports performance in 50m and 400m freestyle races at different levels (U-13 - Swimmers A and U-12 - Swimmers B). In addition, it was also intended to investigate the magnitude of the correlations between some specific variables (i.e., height, weight and wingspan) and the swimming performance. All participants were analyzed, regarding their anthropometric characteristics and their performance in the 50m and 400m freestyle swim. A total of 98 swimmers aged between 11-13 years old (mean ± standard deviation: 12.63 ± 0.76 years of age, 1.59 ± 0.08m height, 47.11 ± 7.82kg body weight) participated in the study. The results suggest that anthropometric characteristics have a positive relationship in the performance of swimmers when comparing genders (p< 0,01), furthermore positive linear correlations was found in height (r = 0.305 and r = 0.253, p <0.01), weight (r = 0.202 and r = 0.140, p <0.01), and wingspan (r = 0.227 and r = 0.203, p < 0.01) for 50m and 400m freestyle swim. The swimmers’ efficiency of segmental movements was related to anthropometric characteristics and strongly associated with the length of the swimmers’ segments. These results may be due to the fact that swimmers’ maturational status may have played an important role, in the observed results. In addition, when comparing genders, the height and weight values of male swimmers tended to be higher. Furthermore, the differences observed in the 50m and 400m freestyle swimming events were related to the relationship that anthropometric characteristics have on the biomechanical parameters of swimming, which influence swimming performance. This study concluded that the improvement of performance of each young national-level swimmer is strongly related to the rate of growth, development and maturation.","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"36 1","pages":"12-25"},"PeriodicalIF":0.5,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76838396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-31DOI: 10.21134/EURJHM.2020.45.0
F. Nakamura, A. Flatt
Within-measure variability Heart rate variability (HRV) is becoming one of the most widely used physiological variables to quantify the stress and recovery of soccer players. At rest, cardiac vagal modulation can be inferred by the logarithm of the root mean square of successive R-R interval differences (lnRMSSD), and it has been shown that higher values are related to higher training status (Proietti et al., 2017). Low variability within a measure relative to baseline may reflect inadequate recovery from previous exertion (Bricout et al., 2010; Muñoz-López, in press) or heightened stress. Reduced lnRMSSD may also be observed near or on match-day due to pre-competitive arousal (Ayuso-Moreno et al., im press). Thus, high variability between consecutive RR intervals within a measure, resulting in a high single day lnRMSSD measure is generally good.
{"title":"To vary or not to vary? Interpreting HRV in soccer players","authors":"F. Nakamura, A. Flatt","doi":"10.21134/EURJHM.2020.45.0","DOIUrl":"https://doi.org/10.21134/EURJHM.2020.45.0","url":null,"abstract":"Within-measure variability Heart rate variability (HRV) is becoming one of the most widely used physiological variables to quantify the stress and recovery of soccer players. At rest, cardiac vagal modulation can be inferred by the logarithm of the root mean square of successive R-R interval differences (lnRMSSD), and it has been shown that higher values are related to higher training status (Proietti et al., 2017). Low variability within a measure relative to baseline may reflect inadequate recovery from previous exertion (Bricout et al., 2010; Muñoz-López, in press) or heightened stress. Reduced lnRMSSD may also be observed near or on match-day due to pre-competitive arousal (Ayuso-Moreno et al., im press). Thus, high variability between consecutive RR intervals within a measure, resulting in a high single day lnRMSSD measure is generally good.","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"65 1","pages":"1-3"},"PeriodicalIF":0.5,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82844902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"INDIVIDUAL PERFORMANCES RELATIVE TO SEASON BESTS IN MAJOR TRACK RUNNING CHAMPIONSHIP RACES ARE DISTANCE-, POSITION- AND SEX-DEPENDENT","authors":"Arturo Casado","doi":"10.21134/eurjhm.44.526","DOIUrl":"https://doi.org/10.21134/eurjhm.44.526","url":null,"abstract":"","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"71 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"CARDIOVASCULAR RESPONSES OF BEGINNER AND ADVANCED PRACTITIONERS TO DIFFERENT VOLUME AND INTENSITY RESISTANCE EXERCISE PROTOCOLS","authors":"Leandro Ferreira","doi":"10.21134/eurjhm.44.545","DOIUrl":"https://doi.org/10.21134/eurjhm.44.545","url":null,"abstract":"","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"17 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
José María Yagüe,José María Izquierdo,Álvaro Muñoz
{"title":"THE RELATIVE EFFECT OF AGE IN INTERNATIONAL FOOTBALL: EUROPE VS SOUTH AMERICA","authors":"José María Yagüe,José María Izquierdo,Álvaro Muñoz","doi":"10.21134/eurjhm.44.539","DOIUrl":"https://doi.org/10.21134/eurjhm.44.539","url":null,"abstract":"","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"40 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.21134/eurjhm.2020.44.559
R. Lamberts, Josu Gomez-Ezeiza
{"title":"THE CONFINEMENT OF ATHLETES BY COVID-19: EFFECTS ON TRAINING, WELLBEING AND THE CHALLENGES WHEN RETURNING TO COMPETITION","authors":"R. Lamberts, Josu Gomez-Ezeiza","doi":"10.21134/eurjhm.2020.44.559","DOIUrl":"https://doi.org/10.21134/eurjhm.2020.44.559","url":null,"abstract":"","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"14 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81686295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.21134/eurjhm.2020.44.544
Martin G. Rosario
School of Physical Therapy, Texas Woman’s University, Dallas, Texas, United States of America. _______________________________________________________________ ___________________________________________________ ABSTRACT Introduction: The XPO Sled Trainer used in this research is a novel device that provides low rolling resistance at low speeds with an instant and automatic equivalent increment in resistance with increased speed. Purpose: To examine the impact of using the XPO Trainer on neuromuscular activation time at low and high speeds in young, seemingly healthy adults. Materials and Methods: This study consisted of 36 healthy adults (age: 24.6±3.9 years). Each participant wore surface electromyography (EMG) electrodes on their dominant leg over the anterior tibialis and gastrocnemius (GA). The four tasks examined in this work were, walk, run, walk pushing (WP) and run pushing (RP). Participants were asked to walk on their self-selected speed. To execute the tasks, participants walked and ran a distance of 40 feet both with and without the XPO Trainer sled. Subjects completed a total of 3 trials per task (total of 12) with one-minute breaks between tasks to reduce fatigue. Results: Neuromuscular time for activation was significantly modified while pushing the sled in both self-selected speeds, particularly in GA muscle. WP and RP exhibited an inverted relationship in neuromuscular timing patterns. Conclusion/Clinical Relevance: We suggest using the sled while walking to provoke endurance and running to work on strengthening of lower leg musculature. The sled proved to be a useful adjunct tool for neuromuscular training in different alterations of the lower limb muscles, especially the extensor musculature.
{"title":"Neuromuscular timing modification in responses to increased speed and proportional resistance while pushing a sled in young adults","authors":"Martin G. Rosario","doi":"10.21134/eurjhm.2020.44.544","DOIUrl":"https://doi.org/10.21134/eurjhm.2020.44.544","url":null,"abstract":"School of Physical Therapy, Texas Woman’s University, Dallas, Texas, United States of America. _______________________________________________________________ ___________________________________________________ ABSTRACT Introduction: The XPO Sled Trainer used in this research is a novel device that provides low rolling resistance at low speeds with an instant and automatic equivalent increment in resistance with increased speed. Purpose: To examine the impact of using the XPO Trainer on neuromuscular activation time at low and high speeds in young, seemingly healthy adults. Materials and Methods: This study consisted of 36 healthy adults (age: 24.6±3.9 years). Each participant wore surface electromyography (EMG) electrodes on their dominant leg over the anterior tibialis and gastrocnemius (GA). The four tasks examined in this work were, walk, run, walk pushing (WP) and run pushing (RP). Participants were asked to walk on their self-selected speed. To execute the tasks, participants walked and ran a distance of 40 feet both with and without the XPO Trainer sled. Subjects completed a total of 3 trials per task (total of 12) with one-minute breaks between tasks to reduce fatigue. Results: Neuromuscular time for activation was significantly modified while pushing the sled in both self-selected speeds, particularly in GA muscle. WP and RP exhibited an inverted relationship in neuromuscular timing patterns. Conclusion/Clinical Relevance: We suggest using the sled while walking to provoke endurance and running to work on strengthening of lower leg musculature. The sled proved to be a useful adjunct tool for neuromuscular training in different alterations of the lower limb muscles, especially the extensor musculature.","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"76 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83866841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.21134/eurjhm.2020.44.543
Pablo Asencio
{"title":"Does handball throwing velocity increase after an eccentric overload-induced postactivation potentiation?","authors":"Pablo Asencio","doi":"10.21134/eurjhm.2020.44.543","DOIUrl":"https://doi.org/10.21134/eurjhm.2020.44.543","url":null,"abstract":"","PeriodicalId":36150,"journal":{"name":"European Journal of Human Movement","volume":"55 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：