D. Bjelica, S. Popović, Selcuk Akpinar, D. Sekulić
N/A
N/A
{"title":"Abstracts from the 19th Annual Scientific Conference of Montenegrin Sports Academy and “Sport, Physical Activity and Health: Contemporary perspectives”: Dubrovnik, Croatia. 7-10 April 2022","authors":"D. Bjelica, S. Popović, Selcuk Akpinar, D. Sekulić","doi":"10.26773/mjssm.220401","DOIUrl":"https://doi.org/10.26773/mjssm.220401","url":null,"abstract":"<jats:p>N/A</jats:p>","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85581643","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}
Michalis Mitrotasios, A. Kubayi, V. Armatas, P. Larkin
The purpose of this study was to investigate open-play crosses at the 2018 FIFA World Cup tournament, with spe- cific reference to the mechanism and match status of the crosses. Descriptive statistics (i.e., frequency counts and percentages) and chi-square tests of association were used to analyse the data. The study observed a total of 949 crosses, resulting in 20 goals scored (2.1%). Descriptive statistics highlighted that offensive teams had more goal-scor- ing attempts when they used counter-attacks (18.6%) compared to organized (18.2%) and direct (10.9%) attacks. A greater number of goal-scoring attempts were observed when teams used out-swinging crosses (17.4%) as opposed to in-swinging (15%) and straight (13.5%) crosses. There was a significant (p < 0.05) association between the type of attack and match status. Winning teams preferred to adopt a counter-attacking style of play; losing teams used more direct attacking strategies, and drawing teams utilized more organized attacks. Losing teams took the highest number of crosses from Zones 1 (61.1%) and 2 (56.7%) compared to other zones. These findings provide practical implications for football coaches to tailor match tactics to replicate crossing scenarios at international competitions.
{"title":"Analysis of Crossing Opportunities at the 2018 FIFA World Cup","authors":"Michalis Mitrotasios, A. Kubayi, V. Armatas, P. Larkin","doi":"10.26773/mjssm.220305","DOIUrl":"https://doi.org/10.26773/mjssm.220305","url":null,"abstract":"The purpose of this study was to investigate open-play crosses at the 2018 FIFA World Cup tournament, with spe- cific reference to the mechanism and match status of the crosses. Descriptive statistics (i.e., frequency counts and percentages) and chi-square tests of association were used to analyse the data. The study observed a total of 949 crosses, resulting in 20 goals scored (2.1%). Descriptive statistics highlighted that offensive teams had more goal-scor- ing attempts when they used counter-attacks (18.6%) compared to organized (18.2%) and direct (10.9%) attacks. A greater number of goal-scoring attempts were observed when teams used out-swinging crosses (17.4%) as opposed to in-swinging (15%) and straight (13.5%) crosses. There was a significant (p < 0.05) association between the type of attack and match status. Winning teams preferred to adopt a counter-attacking style of play; losing teams used more direct attacking strategies, and drawing teams utilized more organized attacks. Losing teams took the highest number of crosses from Zones 1 (61.1%) and 2 (56.7%) compared to other zones. These findings provide practical implications for football coaches to tailor match tactics to replicate crossing scenarios at international competitions.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78422585","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}
Lucas de Albuquerque Freire, M. Brito, Pablo Merino Muñoz, D. Pérez, Hugo Cerda Kohler, E. Aedo-Muñoz, M. Slimani, C. Brito, N. Bragazzi, H. Znazen, B. Miarka
The present study aimed to report different level games in terms of their external game loads, using data collected from GPS performance indicators in Brazilian soccer teams. We used measures of 464 performances of professional soccer athletes during the National Tournament (NT=265), State Tournament (ST=89), National Cup (NC=44), and the International Tournament (IT=66). The performance analysis included the assessment of Total (meters) and Relative (meters/minutes) distances; running (>14km/h), and sprinting (>18km/h) distance; the number of sprints (>18km/h and >24km/h); accelerations (above three m/s2), deceleration (less than three m/s2) and jumps (>30 cm); Total and Relative load – per minute. There were differences (p<0.05) in terms of relative distance between NT and ST (102.2 ±9.5 vs. 98.1± 10.3) and between ST and NC (98.1± 10.3 vs. 103.4 ±9.6). In sprints >18km/h NT differed from ST (60.4 ±5.9 vs 52.7 ±19.9). In sprints >24km/h differences could be found between NT and ST (10.7 ±5.9 vs 8.7 ±5.4). In Total Load NT differed with respect to ST (908.6 ±141.5 vs. 852.7 ±138.5) In Relative Load differences were reported between NT and ST (10 ±1.2 vs. 9.3 ±1.4) and IT (10 ±1.2 vs. 9.4 ±1.4), and between ST and NC (9.3 ±1.4 vs. 10.0 ±1.4). Finally, concerning deceleration, NT differed when compared to ST (36.1 ±9.9 vs. 32 ±11) as well as ST differed from IT (32 ±11 vs. 37.5 ±9.7). The present results make it possible to create specific training games according to tournament level associated with the predominant activities performed during the competition.
本研究旨在报告不同级别游戏的外部游戏负载，使用从巴西足球队的GPS性能指标收集的数据。我们对464名职业足球运动员在全国锦标赛(NT=265)、州锦标赛(ST=89)、全国杯赛(NC=44)和国际锦标赛(IT=66)期间的表现进行了测量。成绩分析包括总(米)距离和相对(米/分钟)距离的评估;跑步(>14km/h)、冲刺(>18km/h)距离;冲刺次数(>18km/h和>24km/h);加速(大于3 m/s2)、减速(小于3 m/s2)和跳跃(>30 cm);总负荷和相对负荷-每分钟。两者存在差异(p18km/h NT差异于ST(60.4±5.9 vs 52.7±19.9))。在>24km/h的短跑中，NT和ST之间存在差异(10.7±5.9 vs 8.7±5.4)。NT与ST的总负荷差异(908.6±141.5 vs 852.7±138.5)，NT与ST的相对负荷差异(10±1.2 vs 9.3±1.4)，IT的相对负荷差异(10±1.2 vs 9.4±1.4)，ST与NC的相对负荷差异(9.3±1.4 vs 10.0±1.4)。最后，在减速方面，NT与ST(36.1±9.9 vs. 32±11)不同，ST与IT(32±11 vs. 37.5±9.7)不同。目前的结果使得根据与比赛期间进行的主要活动相关的锦标赛级别创建特定的训练游戏成为可能。
{"title":"Match Running Performance of Brazilian Professional Soccer Players according to Tournament Types","authors":"Lucas de Albuquerque Freire, M. Brito, Pablo Merino Muñoz, D. Pérez, Hugo Cerda Kohler, E. Aedo-Muñoz, M. Slimani, C. Brito, N. Bragazzi, H. Znazen, B. Miarka","doi":"10.26773/mjssm.220306","DOIUrl":"https://doi.org/10.26773/mjssm.220306","url":null,"abstract":"The present study aimed to report different level games in terms of their external game loads, using data collected from GPS performance indicators in Brazilian soccer teams. We used measures of 464 performances of professional soccer athletes during the National Tournament (NT=265), State Tournament (ST=89), National Cup (NC=44), and the International Tournament (IT=66). The performance analysis included the assessment of Total (meters) and Relative (meters/minutes) distances; running (>14km/h), and sprinting (>18km/h) distance; the number of sprints (>18km/h and >24km/h); accelerations (above three m/s2), deceleration (less than three m/s2) and jumps (>30 cm); Total and Relative load – per minute. There were differences (p<0.05) in terms of relative distance between NT and ST (102.2 ±9.5 vs. 98.1± 10.3) and between ST and NC (98.1± 10.3 vs. 103.4 ±9.6). In sprints >18km/h NT differed from ST (60.4 ±5.9 vs 52.7 ±19.9). In sprints >24km/h differences could be found between NT and ST (10.7 ±5.9 vs 8.7 ±5.4). In Total Load NT differed with respect to ST (908.6 ±141.5 vs. 852.7 ±138.5) In Relative Load differences were reported between NT and ST (10 ±1.2 vs. 9.3 ±1.4) and IT (10 ±1.2 vs. 9.4 ±1.4), and between ST and NC (9.3 ±1.4 vs. 10.0 ±1.4). Finally, concerning deceleration, NT differed when compared to ST (36.1 ±9.9 vs. 32 ±11) as well as ST differed from IT (32 ±11 vs. 37.5 ±9.7). The present results make it possible to create specific training games according to tournament level associated with the predominant activities performed during the competition.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87051861","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}
This study aimed to investigate the acute effects of different levels of muscular fatigue on vertical jump perfor- mance, vertical stiffness, and intralimb coordination. Seventeen physically active men performed two fatigue protocols (low volume and high volume) composed of continuous vertical jumps on separate weeks. Jump height, vertical stiffness, and intralimb coordination were measured during countermovement vertical jumps prior to and immediately following the fatigue protocols. The jumps were performed on a force plate and filmed with high-speed cameras. The continuous relative phase was calculated as a measure of intralimb coordination. Mixed-model ANOVA was used to compare the variables between conditions and times. The fatigue index was greater in the high-volume protocol (27±12%) than in the low-volume protocol (16±7%). Jump height decreased (p≤0.01) after the high-volume protocol. Vertical stiffness decreased (p=0.05), and the continuous relative phase of thigh-shank coupling in the ascent phase of countermovement jumps increased (p=0.04) after both proto- cols. In conclusion, jump performance was only affected by higher fatigue indexes, while vertical stiffness and intralimb coordination were affected similarly irrespective of the fatigue levels.
{"title":"Effects of Different Levels of Fatigue on Vertical Jump Performance, Vertical Stiffness, and Intralimb Coordination","authors":"D. Knihs, J. A. Dias, J. Pupo","doi":"10.26773/mjssm.220301","DOIUrl":"https://doi.org/10.26773/mjssm.220301","url":null,"abstract":"This study aimed to investigate the acute effects of different levels of muscular fatigue on vertical jump perfor- mance, vertical stiffness, and intralimb coordination. Seventeen physically active men performed two fatigue protocols (low volume and high volume) composed of continuous vertical jumps on separate weeks. Jump height, vertical stiffness, and intralimb coordination were measured during countermovement vertical jumps prior to and immediately following the fatigue protocols. The jumps were performed on a force plate and filmed with high-speed cameras. The continuous relative phase was calculated as a measure of intralimb coordination. Mixed-model ANOVA was used to compare the variables between conditions and times. The fatigue index was greater in the high-volume protocol (27±12%) than in the low-volume protocol (16±7%). Jump height decreased (p≤0.01) after the high-volume protocol. Vertical stiffness decreased (p=0.05), and the continuous relative phase of thigh-shank coupling in the ascent phase of countermovement jumps increased (p=0.04) after both proto- cols. In conclusion, jump performance was only affected by higher fatigue indexes, while vertical stiffness and intralimb coordination were affected similarly irrespective of the fatigue levels.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85250059","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}
The purpose of this study was to compare the most demanding scenarios (MDS) encountered by professional basketball players across game quarters and playing positions during official match-play. Ten professional bas- ketball players were monitored during 11 matches using a local positioning system. Peak physical demands were measured via total distance, distance >18 and >21 km·h -1 , number of sprints >18 and >21 km·h -1 , and number of accelerations and decelerations >2 and >3 m∙s -2 captured over 30, 60, 120, 180, and 300-s rolling averages. Linear mixed models and effect sizes (ES) were used to compare MDS encountered between game quarters and playing positions. Between Quarters 1 and 2, there was a reduction in the total distance (ES = 0.64-1.39) for all playing groups along with a reduction in distance >21 km·h -1 in centres (ES = 0.77-0.81) and a reduction in accelerations and decelerations >2 m∙s -2 in guards (ES = 0.66-0.78) across longer sample periods (180-300-s). Between Quarters 1 and 4, reductions in the total distance were evident for forwards and centres (ES = 0.64-0.91) as well as distance and sprints >21 km·h -1 in centres (ES = 0.64-0.97). Regarding positional differences, guards and forwards covered a higher total distance than centres across most quarters and sample periods (ES = 0.22-1.44). Our data suggest a decrease in MDS with game progression in basketball. In addition, MDS appear to be duration-specific and posi- tion-dependent in basketball. Therefore, practitioners should consider these differences in MDS based on game quarters and positional demands to optimise individual and team performance.
{"title":"Differences in the Most Demanding Scenarios of Basketball Match-Play between Game Quarters and Playing Positions in Professional Players","authors":"F. García, Hugo Salazar, Jordan L. Fox","doi":"10.26773/mjssm.220302","DOIUrl":"https://doi.org/10.26773/mjssm.220302","url":null,"abstract":"The purpose of this study was to compare the most demanding scenarios (MDS) encountered by professional basketball players across game quarters and playing positions during official match-play. Ten professional bas- ketball players were monitored during 11 matches using a local positioning system. Peak physical demands were measured via total distance, distance >18 and >21 km·h -1 , number of sprints >18 and >21 km·h -1 , and number of accelerations and decelerations >2 and >3 m∙s -2 captured over 30, 60, 120, 180, and 300-s rolling averages. Linear mixed models and effect sizes (ES) were used to compare MDS encountered between game quarters and playing positions. Between Quarters 1 and 2, there was a reduction in the total distance (ES = 0.64-1.39) for all playing groups along with a reduction in distance >21 km·h -1 in centres (ES = 0.77-0.81) and a reduction in accelerations and decelerations >2 m∙s -2 in guards (ES = 0.66-0.78) across longer sample periods (180-300-s). Between Quarters 1 and 4, reductions in the total distance were evident for forwards and centres (ES = 0.64-0.91) as well as distance and sprints >21 km·h -1 in centres (ES = 0.64-0.97). Regarding positional differences, guards and forwards covered a higher total distance than centres across most quarters and sample periods (ES = 0.22-1.44). Our data suggest a decrease in MDS with game progression in basketball. In addition, MDS appear to be duration-specific and posi- tion-dependent in basketball. Therefore, practitioners should consider these differences in MDS based on game quarters and positional demands to optimise individual and team performance.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91050641","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}
This study aimed to determine the differences in physical activity and sedentary behaviour in preschool children living in different geographical regions. Preschool children (N=1625) and their parents from different parts of Croatia, from urban and rural settlements, participated in this cross-sectional, population-based study. Parents completed the Netherlands Physical Activity Questionnaire (NPAQ), a measure of physical activity and sedentary behaviour in children. The main results of this study show differences in physical activity and sedentary behaviour in preschool children living in four geographical regions in Croatia (F=4.45; p<0.01). The least physically active are children from a continental area that gravitates to the capital city, while the most active are children from a southern coastal region. Sedentary behaviour is the greatest in the rural eastern Croatian continental region. Higher physical activity and lower sedentary activities in young children living in coastal compared to continen- tal regions show possible specific advantages of Mediterranean climate in general. The practical importance of information obtained in this study is a need for a specific intervention strategy for improving physical activity in continental preschool institutions.
{"title":"Physical Activity and Sedentary Behaviour in Croatian Preschool Children: A Population-Based Study","authors":"Maja Vukelja, D. Milanovic, Sanja Šalaj","doi":"10.26773/mjssm.220304","DOIUrl":"https://doi.org/10.26773/mjssm.220304","url":null,"abstract":"This study aimed to determine the differences in physical activity and sedentary behaviour in preschool children living in different geographical regions. Preschool children (N=1625) and their parents from different parts of Croatia, from urban and rural settlements, participated in this cross-sectional, population-based study. Parents completed the Netherlands Physical Activity Questionnaire (NPAQ), a measure of physical activity and sedentary behaviour in children. The main results of this study show differences in physical activity and sedentary behaviour in preschool children living in four geographical regions in Croatia (F=4.45; p<0.01). The least physically active are children from a continental area that gravitates to the capital city, while the most active are children from a southern coastal region. Sedentary behaviour is the greatest in the rural eastern Croatian continental region. Higher physical activity and lower sedentary activities in young children living in coastal compared to continen- tal regions show possible specific advantages of Mediterranean climate in general. The practical importance of information obtained in this study is a need for a specific intervention strategy for improving physical activity in continental preschool institutions.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73913929","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}
This research tested the interactions among organizational learning culture, leadership styles, climate for innovation, and marketing concept of sports clubs in team sports. The study included elite sport managers (N=118), from four team sports (football, basketball, handball, and volleyball), who participated in the highest rank of national competition in Serbia. The organizational learning culture was measured with attitudes of respondents about the organizational learning culture at individual, team or group level, and organization as dichotomous variables, while leadership styles used the MLQ self-assessment questionnaire. The climate for innovation scale was measured with scales for assessing organizational support for creativity, maladaptation, support for innovation, and resource supply. The presence/absence of components of the different marketing mix aspects was measured as a four-dimensional variable for evaluation marketing concept. The results supported the mediation and path models. Direct effect to variable marketing concept is noticed only in the organizational learning culture, while climate for innovations and leadership style did not have a direct effect on the marketing concept. Indirect effects revealed that the status of the sports branch, the market position of each club in its sport competitive results, and the education background of managers' impact marketing concept in team sports in Serbia. The theoretical and practical contributions of obtaining results are discussed.
{"title":"Marketing Concept in Elite Team Sports Clubs in Serbia: Impact of Leadership Styles, Organizational Learning Culture, and Climate for Innovation","authors":"R. Matic","doi":"10.26773/mjssm.220309","DOIUrl":"https://doi.org/10.26773/mjssm.220309","url":null,"abstract":"This research tested the interactions among organizational learning culture, leadership styles, climate for innovation, and marketing concept of sports clubs in team sports. The study included elite sport managers (N=118), from four team sports (football, basketball, handball, and volleyball), who participated in the highest rank of national competition in Serbia. The organizational learning culture was measured with attitudes of respondents about the organizational learning culture at individual, team or group level, and organization as dichotomous variables, while leadership styles used the MLQ self-assessment questionnaire. The climate for innovation scale was measured with scales for assessing organizational support for creativity, maladaptation, support for innovation, and resource supply. The presence/absence of components of the different marketing mix aspects was measured as a four-dimensional variable for evaluation marketing concept. The results supported the mediation and path models. Direct effect to variable marketing concept is noticed only in the organizational learning culture, while climate for innovations and leadership style did not have a direct effect on the marketing concept. Indirect effects revealed that the status of the sports branch, the market position of each club in its sport competitive results, and the education background of managers' impact marketing concept in team sports in Serbia. The theoretical and practical contributions of obtaining results are discussed.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73004236","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}
Weightlifting derivatives have become an increasingly popular form of resistance training among youth athletes over the past decade. This study aimed to examine the loading profiles of youth athletes during the hang power clean to determine optimal loading parameters for force, power, rate of force development, and barbell velocity. Sixteen male youth athletes (Age: 16.94 ± 0.97 years; Height: 180.08 ± 8.14 cm; Body mass: 81.06 ± 15.04 kg; Hang Clean 1RM 70.17 ± 14.41 kg) performed three repetitions of the hang power clean at 10% intervals ranging from 30-90% of their one-repetition maximum (1RM). One-way repeated measures ANONAs revealed that external load had a significant effect on the peak and average of all variables examined (p < 0.05). Most notably, peak power was maximized at 70% 1RM which was not significantly different 60-90% 1RM. Peak rate of force development was maximized at 90% 1RM, though it was not significantly greater than 50-90%1RM. Conversely peak barbell velocity was maximized at 30% 1RM which was significantly greater than 50-90% 1RM. While the results for power are similar to that of older, stronger athletes, the youth population in this study maximized barbell velocity and rate of force development at different external loads compared to more developed athletes. These results seem to suggest that youth athletes need to achieve a higher level of strength before they are capable of training with high relative external loads while maintaining high barbell velocities.
{"title":"An Examination of Loading Profiles for Youth Athletes Performing the Hang Power Clean","authors":"Kelton Mehls, Sarah C. Martinez, Connor Edwards","doi":"10.26773/mjssm.220308","DOIUrl":"https://doi.org/10.26773/mjssm.220308","url":null,"abstract":"Weightlifting derivatives have become an increasingly popular form of resistance training among youth athletes over the past decade. This study aimed to examine the loading profiles of youth athletes during the hang power clean to determine optimal loading parameters for force, power, rate of force development, and barbell velocity. Sixteen male youth athletes (Age: 16.94 ± 0.97 years; Height: 180.08 ± 8.14 cm; Body mass: 81.06 ± 15.04 kg; Hang Clean 1RM 70.17 ± 14.41 kg) performed three repetitions of the hang power clean at 10% intervals ranging from 30-90% of their one-repetition maximum (1RM). One-way repeated measures ANONAs revealed that external load had a significant effect on the peak and average of all variables examined (p < 0.05). Most notably, peak power was maximized at 70% 1RM which was not significantly different 60-90% 1RM. Peak rate of force development was maximized at 90% 1RM, though it was not significantly greater than 50-90%1RM. Conversely peak barbell velocity was maximized at 30% 1RM which was significantly greater than 50-90% 1RM. While the results for power are similar to that of older, stronger athletes, the youth population in this study maximized barbell velocity and rate of force development at different external loads compared to more developed athletes. These results seem to suggest that youth athletes need to achieve a higher level of strength before they are capable of training with high relative external loads while maintaining high barbell velocities.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74584906","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}
In ancient times, science was practiced only by the privileged, primarily because of its poor accessibility. However, the development of ICT has enabled modern man to make science much more accessible to him/ her. For that reason, today, there are many more scientists who are trying to change the world for the better with their activities. In the race for new knowledge and original discoveries, scientists want to be better than others. Different metrics are used to measure quality among scientists. Stanford University recently published an updated list of the best scientists in the world, which is considered one of the most prestigious. On a recently published list, three editors of Montenegrin Journal of Sports Science and Medicine: Yousef Saleh Khader, Sergej M. Ostojic and Stevo Popovic have been ranked among the world’s top 2% most-cited scientists in 2020 and the purpose of this editorial is to recognize and promote their scientific impact and scientific excellence.
在古代，只有特权阶层才从事科学研究，主要是因为它不易接近。然而，信息通信技术的发展使现代人能够更容易地接触到科学。因此，今天，有更多的科学家试图通过他们的活动让世界变得更美好。在争夺新知识和原创发现的竞赛中，科学家们希望比别人做得更好。不同的标准被用来衡量科学家的质量。斯坦福大学最近公布了一份最新的世界上最好的科学家名单，这被认为是最负盛名的名单之一。在最近公布的一份名单中，黑山体育科学与医学杂志的三位编辑:Yousef Saleh Khader, Sergej M. Ostojic和Stevo Popovic在2020年被引用最多的科学家中排名世界前2%，这篇社论的目的是承认和促进他们的科学影响和科学卓越性。
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This study aims to examine repeated sprint performances of young soccer players in the same age category according to competition level and playing positions. 67 young soccer players in the U16 age category and from 4 different teams competing in two different competition levels participated voluntarily in this study. The participants performed the Bangsbo Sprint Test adapted by Wragg (7×34,2 m with 25-second recovery) to determine repeated sprint performance. The test variables were best sprint time, mean sprint time, and the fatigue index. The best sprint time and mean sprint time results varied according to competition level (p˂0,05) but the fatigue index did not differentiate according to competition level (p˃0,05). It is also determined that at a high competition level players have revealed better-repeated sprint performance. When examined the data in terms of game position, best sprint time and mean time values have varied (p˂0,05) but the fatigue index did not have significant differences (p˃0,05). Considering the data according to game positions, forwards, full-backs and wingers showed higher performance than central midfielders, central defenders, and goalkeepers. Consequently, our results suggest that performance in repeated-sprint the best sprint values and mean sprint values belonging to repeated performances of youth players from the same age category differ according to competition levels and game positions, whereas the fatigue index does not differ.
{"title":"Repeated Sprint Ability of Youth Football Players in the Same Age Category According to Playing Position and Competition Level","authors":"O. Çetin, M. Kocak","doi":"10.26773/mjssm.220307","DOIUrl":"https://doi.org/10.26773/mjssm.220307","url":null,"abstract":"This study aims to examine repeated sprint performances of young soccer players in the same age category according to competition level and playing positions. 67 young soccer players in the U16 age category and from 4 different teams competing in two different competition levels participated voluntarily in this study. The participants performed the Bangsbo Sprint Test adapted by Wragg (7×34,2 m with 25-second recovery) to determine repeated sprint performance. The test variables were best sprint time, mean sprint time, and the fatigue index. The best sprint time and mean sprint time results varied according to competition level (p˂0,05) but the fatigue index did not differentiate according to competition level (p˃0,05). It is also determined that at a high competition level players have revealed better-repeated sprint performance. When examined the data in terms of game position, best sprint time and mean time values have varied (p˂0,05) but the fatigue index did not have significant differences (p˃0,05). Considering the data according to game positions, forwards, full-backs and wingers showed higher performance than central midfielders, central defenders, and goalkeepers. Consequently, our results suggest that performance in repeated-sprint the best sprint values and mean sprint values belonging to repeated performances of youth players from the same age category differ according to competition levels and game positions, whereas the fatigue index does not differ.","PeriodicalId":18942,"journal":{"name":"Montenegrin Journal of Sports Science and Medicine","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86294285","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}
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