U. Corrêa, F. Bastos, Silvia Letícia da Silva, Fabian Alberto Romero Clavijo, Camila Torriani-Pasin
This study investigated the role the dyadic interaction variability plays in influencing decision making on passing in the sport of futsal. Participants were 40 male students (Mage = 13.6 years, SD = 0.7) from physical education classes of a Brazilian school. They were randomly divided into eight teams, which played four games of 24 minutes according to the rules of the under-14 category of the local Futsal Federation. From the games, a sample of 80 sequences of play involving passes were randomly selected, from the moment the ball carrier got possession of the ball until the moment he passed it. From the x and y coordinates of all outfield players’ displacement, variability of running correlation, cross-correlation, centroid , and interpersonal distance were calculated as measures of dyadic interaction. Results showed that the interaction of passer and receiver dyads were more variable than the remaining dyads. Moreover, it was verified that the passer dyad had the highest variability. The findings enabled us to conclude that, from the attackers’ point of view, variability played a positive role. In addition, it appeared that the passer sought to disrupt the interaction with his defender to perform a pass more than his teammates did to receive it. It appears that the skills of passing and receiving in the sport of futsal imply the ability to vary.
{"title":"Higher variability in dyadic interaction plays a positive role in the decision making of futsal passing","authors":"U. Corrêa, F. Bastos, Silvia Letícia da Silva, Fabian Alberto Romero Clavijo, Camila Torriani-Pasin","doi":"10.26582/K.52.2.17","DOIUrl":"https://doi.org/10.26582/K.52.2.17","url":null,"abstract":"This study\u0000investigated the role the dyadic interaction variability plays in influencing\u0000decision making on passing in the sport of futsal. Participants were 40 male\u0000students (Mage = 13.6 years, SD = 0.7) from physical\u0000education classes of a Brazilian school. They were randomly divided into eight\u0000teams, which played four games of 24 minutes\u0000according to the rules of the under-14 category of the\u0000local Futsal Federation. From the games, a sample of 80 sequences of play involving passes were randomly selected, from the\u0000moment the ball carrier got possession of the ball until the moment he passed\u0000it. From the x and y coordinates of all outfield players’\u0000displacement, variability of running correlation, cross-correlation, centroid , and\u0000interpersonal distance were calculated as measures of dyadic interaction.\u0000Results showed that the interaction of passer and\u0000receiver dyads were more variable than the remaining dyads. Moreover, it was\u0000verified that the passer dyad had\u0000the highest variability. The findings enabled us to conclude that, from the attackers’ point of\u0000view, variability played a positive role. In addition, it appeared that the\u0000passer sought to disrupt the interaction with his defender to perform a pass\u0000more than his teammates did to receive it. It appears that the skills of\u0000passing and receiving in the sport of futsal imply the\u0000ability to vary.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42575060","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}
P. Mitić, J. Nedeljković, Vladimir Takšić, G. Sporiš, Nenad Stojiljković, Lucija Milčić
The sample consisted of 171 elite and 169 non-elite athletes. linear regression analysis was used to test the prognostic role of emotional competence on stress coping strategies, and hierarchical regression analysis was used to test the moderating role of performance in the relationship between emotional competence and coping strategies. The result shows that EI is related to task-oriented strategies and completely unrelated to emotion-oriented strategies. Sport performance moderates the relationship between managing and regulating emotions and using avoidant coping strategies, in a way that non-elite athletes with higher scores on this EI subfactor are more likely to use distraction-oriented coping. Key words: emotional intelligence, coping, moderation, elite and non-elite athletes
{"title":"Sports performance as a moderator of the relationship between coping strategy and emotional intelligence","authors":"P. Mitić, J. Nedeljković, Vladimir Takšić, G. Sporiš, Nenad Stojiljković, Lucija Milčić","doi":"10.26582/K.52.2.15","DOIUrl":"https://doi.org/10.26582/K.52.2.15","url":null,"abstract":"The sample consisted of 171 elite and 169 non-elite athletes. linear regression analysis was used to test the prognostic role of emotional competence on stress coping strategies, and hierarchical regression analysis was used to test the moderating role of performance in the relationship between emotional competence and coping strategies. The result shows that EI is related to task-oriented strategies and completely unrelated to emotion-oriented strategies. Sport performance moderates the relationship between managing and regulating emotions and using avoidant coping strategies, in a way that non-elite athletes with higher scores on this EI subfactor are more likely to use distraction-oriented coping. Key words: emotional intelligence, coping, moderation, elite and non-elite athletes","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":"52 1","pages":"281-289"},"PeriodicalIF":1.2,"publicationDate":"2020-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49526511","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}
Diego Moreno-Pérez, Á. López-Samanés, Aitor Centeno, J. Esteve-Lanao, I. Diez-Vega
Tensiomyography (TMG) is a non-invasive technique commonly used for evaluating muscle properties in highly trained athletes. The aim of our study was to evaluate the mechanical characteristics of m. triceps surae in competitive runners through TMG measurement and analyze if there was a relationship with running economy (RE). Nine male runners completed the study (mean±SD: age 40.4±9.0 years, body height 176.2±4.9 cm, body mass 70.7±9.4 kg, 10-km time 39.8±5.9 min, VO2peak 56.9 ± 6.5 mL kg-1 min-1). Each subject visited the lab on two occasions with 72h of rest between the trials. On the first day, an incremental test was performed to determine their ventilatory thresholds and peak oxygen consumption. On the second day, RE was evaluated on a treadmill at the velocity of their first ventilatory threshold (VT1), and mechanical characteristics of the soleus and gastrocnemius muscles were analyzed with TMG. Significant differences were found between the economic and non-economic runners in m. soleus in delayed time (Td), contraction time (Tc), and maximal radial displacement of the muscle belly (Dm). Also, significant differences were found in contraction time (Tc) in medium calf (MC) and in half relaxation time (Tr) in lateral twin (LT). The main finding of our study was that the runners with better RE showed greater stiffness in the triceps surae muscles, an aspect that seems to be associated with better performance in athlete runners.Key words: running economy (RE), tensiomyography (TMG), m. triceps surae, m. gastrocnemius, m. soleus
{"title":"Relationship between running economy and mechanical characteristics of triceps surae assessed with tensiomyography","authors":"Diego Moreno-Pérez, Á. López-Samanés, Aitor Centeno, J. Esteve-Lanao, I. Diez-Vega","doi":"10.26582/K.52.2.12","DOIUrl":"https://doi.org/10.26582/K.52.2.12","url":null,"abstract":"Tensiomyography (TMG) is a non-invasive technique commonly used for evaluating muscle properties in highly trained athletes. The aim of our study was to evaluate the mechanical characteristics of m. triceps surae in competitive runners through TMG measurement and analyze if there was a relationship with running economy (RE). Nine male runners completed the study (mean±SD: age 40.4±9.0 years, body height 176.2±4.9 cm, body mass 70.7±9.4 kg, 10-km time 39.8±5.9 min, VO2peak 56.9 ± 6.5 mL kg-1 min-1). Each subject visited the lab on two occasions with 72h of rest between the trials. On the first day, an incremental test was performed to determine their ventilatory thresholds and peak oxygen consumption. On the second day, RE was evaluated on a treadmill at the velocity of their first ventilatory threshold (VT1), and mechanical characteristics of the soleus and gastrocnemius muscles were analyzed with TMG. Significant differences were found between the economic and non-economic runners in m. soleus in delayed time (Td), contraction time (Tc), and maximal radial displacement of the muscle belly (Dm). Also, significant differences were found in contraction time (Tc) in medium calf (MC) and in half relaxation time (Tr) in lateral twin (LT). The main finding of our study was that the runners with better RE showed greater stiffness in the triceps surae muscles, an aspect that seems to be associated with better performance in athlete runners.Key words: running economy (RE), tensiomyography (TMG), m. triceps surae, m. gastrocnemius, m. soleus","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":"52 1","pages":"273-280"},"PeriodicalIF":1.2,"publicationDate":"2020-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43786800","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}
A. L. Arcos, Raúl Martínez-Santos, F. Clemente, Daniel Castillo
The aim of this study was to assess the changes in jump and sprint performances after the preseason period across 14 seasons depending on the initial performance level and the playing position in young professional soccer players. In total, 162 soccer players (age = 20.6 ± 1.8 years) belonging to the same reserve team of a Spanish La Liga club participated in this study. Countermovement jump (CMJ) and 5 and 15 m sprints were assessed in each season at the start of the preseason (July), Test 1 (T1), and the start of the competitive period (September), Test 2 (T2), from the 1998 to 2013 seasons. Considering all seasons, a trivial change was found in the sprint (5 m, Effect Size [ES] = −0.01; ±0.11, most-likely; and 15 m, ES = 0.05; ±0.09, most-likely) and countermovement jump (CMJ) performances (ES = −0.03; ±0.07; most-likely) after the preseason, but this varied across the seasons. While the fastest players in 5 m and 15 m tests and the most powerful worsened their performances in sprinting capacity (ES = 0.53–0.65, small very-likely) and in jump ability (ES = −0.54; ±0.25, small very-likely), respectively, the slowest players and the less powerful improved their performance likely/most-likely (ES = −0.33 and −0.68, small and moderate) and very-likely (ES = 0.40; ±0.20, small) after the precompetitive period. The changes in CMJ and sprinting were trivial and trivial/small for all tactical positions. The changes in neuromuscular performance after the preseason were not stable across the seasons and varied depending on the initial performance level. Individualization strategies should be considered in the design of strength and conditioning programs in order to optimize the training process.
{"title":"Changes in jump and sprint performances during 14 preseasons in a Spanish reserve elite soccer team","authors":"A. L. Arcos, Raúl Martínez-Santos, F. Clemente, Daniel Castillo","doi":"10.26582/k.52.2.10","DOIUrl":"https://doi.org/10.26582/k.52.2.10","url":null,"abstract":"The aim of this study was to assess the changes in jump and sprint performances after the preseason period across 14 seasons depending on the initial performance level and the playing position in young professional soccer players. In total, 162 soccer players (age = 20.6 ± 1.8 years) belonging to the same reserve team of a Spanish La Liga club participated in this study. Countermovement jump (CMJ) and 5 and 15 m sprints were assessed in each season at the start of the preseason (July), Test 1 (T1), and the start of the competitive period (September), Test 2 (T2), from the 1998 to 2013 seasons. Considering all seasons, a trivial change was found in the sprint (5 m, Effect Size [ES] = −0.01; ±0.11, most-likely; and 15 m, ES = 0.05; ±0.09, most-likely) and countermovement jump (CMJ) performances (ES = −0.03; ±0.07; most-likely) after the preseason, but this varied across the seasons. While the fastest players in 5 m and 15 m tests and the most powerful worsened their performances in sprinting capacity (ES = 0.53–0.65, small very-likely) and in jump ability (ES = −0.54; ±0.25, small very-likely), respectively, the slowest players and the less powerful improved their performance likely/most-likely (ES = −0.33 and −0.68, small and moderate) and very-likely (ES = 0.40; ±0.20, small) after the precompetitive period. The changes in CMJ and sprinting were trivial and trivial/small for all tactical positions. The changes in neuromuscular performance after the preseason were not stable across the seasons and varied depending on the initial performance level. Individualization strategies should be considered in the design of strength and conditioning programs in order to optimize the training process.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":"52 1","pages":"224-231"},"PeriodicalIF":1.2,"publicationDate":"2020-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44253855","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}
Matías Henríquez, M. Kokaly, Felipe Herrera, R. Reina
This study aimed to describe and determine relationships between repeated sprint and change of direction abilities in football players with cerebral palsy according to four sport classes (FT5 to FT8). Seventeen male football players with cerebral palsy took part in this study (23.0±4.7 years, 65.9±9.5 kg, 168.8±5.9 cm). The repeated sprint ability (6×40-m sprints with a 20-second recovery) was evaluated to determine the best sprint time, mean sprint time, and percentage of sprint decrement. The difference in lactate concentration was determined using blood samples taken three minutes before and after testing. The Illinois Agility Test (IAT) was also used to assess players’ change of direction ability. The FT8 players had better performance (p<.01) in the best sprint time, mean sprint time and in the IAT scores compared to the players of the sport classes FT5/6. Players of the sport class FT7 also reached higher performance in the IAT compared to the players of the sport classes FT5/6 (p<.05). A significant correlation was found between the best sprint time and mean sprint time (r=.94, p<.01), the best sprint time and the IAT (r=.62, p<.01), and between the best sprint time and the difference in lactate concentration (r=-.51, p<.05). The relationships between repeated sprint and change of direction abilities demonstrate the performance profile of para-footballers with cerebral palsy in those variables according to their sport classes, exhibiting lower performance than the values reported for regular football players.Keywords: physical performance, para-sport, brain impairment, Paralympic sport
{"title":"The relationship among repeated sprint and change of direction abilities in football players with cerebral palsy","authors":"Matías Henríquez, M. Kokaly, Felipe Herrera, R. Reina","doi":"10.26582/K.52.2.6","DOIUrl":"https://doi.org/10.26582/K.52.2.6","url":null,"abstract":"This study aimed to describe and determine relationships between repeated sprint and change of direction abilities in football players with cerebral palsy according to four sport classes (FT5 to FT8). Seventeen male football players with cerebral palsy took part in this study (23.0±4.7 years, 65.9±9.5 kg, 168.8±5.9 cm). The repeated sprint ability (6×40-m sprints with a 20-second recovery) was evaluated to determine the best sprint time, mean sprint time, and percentage of sprint decrement. The difference in lactate concentration was determined using blood samples taken three minutes before and after testing. The Illinois Agility Test (IAT) was also used to assess players’ change of direction ability. The FT8 players had better performance (p<.01) in the best sprint time, mean sprint time and in the IAT scores compared to the players of the sport classes FT5/6. Players of the sport class FT7 also reached higher performance in the IAT compared to the players of the sport classes FT5/6 (p<.05). A significant correlation was found between the best sprint time and mean sprint time (r=.94, p<.01), the best sprint time and the IAT (r=.62, p<.01), and between the best sprint time and the difference in lactate concentration (r=-.51, p<.05). The relationships between repeated sprint and change of direction abilities demonstrate the performance profile of para-footballers with cerebral palsy in those variables according to their sport classes, exhibiting lower performance than the values reported for regular football players.Keywords: physical performance, para-sport, brain impairment, Paralympic sport","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":"52 1","pages":"208-216"},"PeriodicalIF":1.2,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48909039","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}
Augusto Cézar Rodrigues Rocha, G. Pedrosa, A. B. Freire, G. Praça, Herbert Ugrinowitsch, H. Castro, G. Costa
The objective of this study was to identify how the ecological variables influence the setter during the setting and what were the predictive factors of the attack effect among Brazilian teams ranked from the 1st to 4th place in the volleyball Women’s Super-League in 2016-2017. We analyzed 768 attacks from 10 matches played among the teams. A descriptive analysis was performed and, to identify how the setting location differed in relation to the ecological variables, the One-Way ANOVA (factor 1 = setting location) was used. In addition, multinomial logistic regression was performed to understand the predictive factors of the effect of the attack. The significance level was set at 5% (p≤.05) and the SPSS software version 20.0 was used. The results showed the setting location differed according to the distance between the setter and the central attacker, the distance between the setter and the central blocker, and the distance between the setter and the blocker of position 4. Besides, it was observed that the powerful attack and the blocking touch were predictive factors of the effect of the attack. Thus, it is concluded that the decision-making for the action of the setting is based on the availability of the central attacker and the configuration of the blockers, the powerful attack reduces the chances of defense and the blocking touch reduces the chances of scoring by attacking.
{"title":"Analysis of the setting and predictive factors of the effect of attack according to game ecology","authors":"Augusto Cézar Rodrigues Rocha, G. Pedrosa, A. B. Freire, G. Praça, Herbert Ugrinowitsch, H. Castro, G. Costa","doi":"10.26582/K.52.2.7","DOIUrl":"https://doi.org/10.26582/K.52.2.7","url":null,"abstract":"The objective of this study\u0000was to identify how the ecological variables influence the setter during the\u0000setting and what were the predictive factors of the attack effect among Brazilian\u0000teams ranked from the 1st to 4th place in the volleyball\u0000Women’s Super-League in 2016-2017. We analyzed 768 attacks from 10 matches played\u0000among the teams. A descriptive analysis was performed and, to identify how the\u0000setting location differed in relation to the ecological variables, the One-Way\u0000ANOVA (factor 1 = setting location) was used. In addition, multinomial logistic\u0000regression was performed to understand the predictive factors of the effect of\u0000the attack. The significance level was set at 5% (p≤.05) and the SPSS software\u0000version 20.0 was used. The results showed the setting location differed\u0000according to the distance between the setter and the central attacker, the\u0000distance between the setter and the central blocker, and the distance between\u0000the setter and the blocker of position 4. Besides, it was observed that the powerful\u0000attack and the blocking touch were predictive factors of the effect of the\u0000attack. Thus, it is concluded that the decision-making for the action of the\u0000setting is based on the availability of the central attacker and the\u0000configuration of the blockers, the powerful attack reduces the chances of\u0000defense and the blocking touch reduces the chances of scoring by attacking.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48008315","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}
Vjekoslav Cigrovski, Tomislav Rupčić, Ivan Bon, Mateja Očić, Tomislav Krističević
Traditionally used methods for kinematic analysis of alpine skiing has limitations regarding data collecting and data processing. Also, analysis of measured parameters, interpretation, and implementation in practice are postponed. Therefore, aim of this paper was to determine differences in the performance of slalom turns between three conditions using a relatively new technology that allows fast data collecting and analysis. Twenty kinematic variables were analysed for each turn (both the left and right) and 26 turns were executed in each condition. All turns were performed by a national skiing demonstrator. Differences were determined by MANOVA (F=71.3; p=.00). Tukey’s post-hoc test showed that the turns performed on the ski simulator differed in every variable from the turns performed in other two condition, and the free skiing turns differed from the corridor turns in the following variables: hip joint angle of abduction of the right leg in the left turn, p=.00; distance of the projection of the centre of mass relative to the right foot in the left turn, p=.00; hip joint angle of flexion of the left leg in the left turn, p=.02; hip joint angle of abduction of the left leg in the left turn, p=.01; distance of the projection of the centre of mass relative to the left foot in the left turn, p=.00; knee angle of flexion of the left leg in the right turn, p=.04). The kinematic parameters obtained using the XSENS suit during slalom turns performed on the ski simulator and ski slope suggested significant differences in the position of the lower extremities, which might be important for situational efficiency and technical performance. Our results can be used to improve the alpine skiing technique. They suggest more precise relations between space parameters, such as body position and the angles between different body segments during a slalom turn. Methodology of research and technology used could contribute to the development of new scientific approaches in biomechanical research of top-level sports.
{"title":"How can xsens kinematic suit add to our understanding of a slalom turn","authors":"Vjekoslav Cigrovski, Tomislav Rupčić, Ivan Bon, Mateja Očić, Tomislav Krističević","doi":"10.26582/k.52.2.4","DOIUrl":"https://doi.org/10.26582/k.52.2.4","url":null,"abstract":"Traditionally used methods for kinematic analysis of alpine skiing has limitations regarding data collecting and data processing. Also, analysis of measured parameters, interpretation, and implementation in practice are postponed. Therefore, aim of this paper was to determine differences in the performance of slalom turns between three conditions using a relatively new technology that allows fast data collecting and analysis. Twenty kinematic variables were analysed for each turn (both the left and right) and 26 turns were executed in each condition. All turns were performed by a national skiing demonstrator. Differences were\u0000determined by MANOVA (F=71.3; p=.00). Tukey’s post-hoc test showed that\u0000the turns performed on the ski simulator differed in every variable from the turns performed in other two condition, and the free skiing turns differed from the corridor turns in the following variables: hip joint angle of abduction of the right leg in the left turn, p=.00; distance of the projection of the centre of mass relative to the right foot in the left turn, p=.00; hip joint angle of flexion of the left leg\u0000in the left turn, p=.02; hip joint angle of abduction of the left leg in the left turn, p=.01; distance of the projection of the centre of mass relative to the left foot in the left turn, p=.00; knee angle of flexion of the left leg in the right turn, p=.04). The kinematic parameters obtained using the XSENS suit during slalom turns performed on the ski simulator and ski slope suggested significant differences in the position of the lower extremities, which might be important for situational efficiency and technical performance. Our results can be used to improve the alpine skiing technique. They suggest more precise relations between space parameters, such as body position and the angles\u0000between different body segments during a slalom turn. Methodology of research and technology used could contribute to the development of new scientific approaches in biomechanical research of top-level sports.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43617323","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}
Shirko Ahmadi, J. Marszałek, G. L. Gutierrez, M. Uchida
The aim of the present study was to describe and compare physical profiles and certain psychologicalaspects of sitting volleyball players in a national team and in a league team. Twenty-seven Brazilian sittingvolleyball players (15 from the national team, 12 from the league team) took part in this study. They completeddemographics, FANTASTIC, anthropometrics, handgrip, seated chest pass, modified agility T, modified speedand agility, and speed and endurance tests. Data were processed by χ2-test, Mann-Whitney U test, Pearsoncorrelation, and a stepwise multiple linear regression analysis. The national team players had significantlymore training time and better lifestyle (p<.01) than the league players. Significant regression equation resultsfor predicting players’ level included weekly training volume and hip circumference (R2=.68). In conclusion,national team and league players differed in just psychological aspects and magnitude training time, whichshow the importance of psychological characteristics in elite sitting volleyball.
{"title":"Sitting volleyball players","authors":"Shirko Ahmadi, J. Marszałek, G. L. Gutierrez, M. Uchida","doi":"10.26582/k.52.2.3","DOIUrl":"https://doi.org/10.26582/k.52.2.3","url":null,"abstract":"The aim of the present study was to describe and compare physical profiles and certain psychologicalaspects of sitting volleyball players in a national team and in a league team. Twenty-seven Brazilian sittingvolleyball players (15 from the national team, 12 from the league team) took part in this study. They completeddemographics, FANTASTIC, anthropometrics, handgrip, seated chest pass, modified agility T, modified speedand agility, and speed and endurance tests. Data were processed by χ2-test, Mann-Whitney U test, Pearsoncorrelation, and a stepwise multiple linear regression analysis. The national team players had significantlymore training time and better lifestyle (p<.01) than the league players. Significant regression equation resultsfor predicting players’ level included weekly training volume and hip circumference (R2=.68). In conclusion,national team and league players differed in just psychological aspects and magnitude training time, whichshow the importance of psychological characteristics in elite sitting volleyball.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":"52 1","pages":"169-177"},"PeriodicalIF":1.2,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45840483","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}
María Desamparados Bernat-Adell, Rania Achouak Hafsi, P. Medina, A. Folch-Ayora, Carlos Hernando-Domingo, I. Martínez-Navarro, E. Collado-Boira
The practice of long- and medium-distance races has exponentially increased the number of participants in recent years. They are carried out under extreme conditions that cause both biochemical and anthropometric changes in athletes and, in addition, have serious risks associated, such as dehydration, thermal disorders, or hypoglycemia. Knowledge regarding alterations at hematological level after this type of effort is limited. The objectives of this pre-post analytical descriptive observational study were: to describe and compare hematological values in amateur runners pre and post road marathon and ultratrail races, and to compare the hematological parameters between the groups in the two times analyzed by means of univariate descriptive statistical analyses, intra-group pre-post comparisons (Wilcoxon Signed-Rank Test), and comparisons between the groups (Mann-Whitney U Test). Effect size was calculated using Cohen’s D. An explanatory model (Multiple Logistic Regression) was created. Statistical significance was set at p<.05. The Wilcoxon test for marathon runners observed significant differences (p≤.001) in the white series. In ultratrail runners, the results were similar, with significant differences (p≤.001) in the platelet series. The Mann-Whitney U test showed the same pre-race hematological conditions for both groups, except for hematocrit and corpuscular values (p≤.001). Significant differences (p≤.001) were also found in the post-race leukocyte and neutrophil values. Significant differences in hematological parameters have been observed both between and within the groups. The differences with greater significance corresponded to the leukocyte series.
近年来，中长跑的练习使参赛人数呈指数级增长。它们是在极端条件下进行的，这些条件会导致运动员的生化和人体测量发生变化，此外还具有严重的相关风险，如脱水、热障碍或低血糖。在这种努力之后，关于血液学水平变化的知识是有限的。这项前后分析描述性观察性研究的目的是：描述和比较业余跑步者在公路马拉松和超级越野赛前后的血液学值，并通过单变量描述性统计分析、组内前后比较（Wilcoxon Signed RankTest）、，以及两组之间的比较（Mann-Whitney U检验）。使用Cohen’s D.计算效应大小。创建了一个解释模型（多元逻辑回归）。统计学显著性设定为p＜0.05。马拉松运动员的Wilcoxon检验在白色系列中观察到显著差异（p≤.001）。在超级越野跑中，结果相似，在平板系列中有显著差异（p≤.001）。Mann-Whitney U检验显示，除了红细胞压积和红细胞值（p≤.001）外，两组的赛前血液学状况相同。赛后白细胞和中性粒细胞值也存在显著差异（p≤0.001）。在各组之间和组内观察到血液学参数的显著差异。具有更大意义的差异对应于白细胞系列。
{"title":"Hematological variability analysis after road marathon vs ultratrail","authors":"María Desamparados Bernat-Adell, Rania Achouak Hafsi, P. Medina, A. Folch-Ayora, Carlos Hernando-Domingo, I. Martínez-Navarro, E. Collado-Boira","doi":"10.26582/k.52.2.2","DOIUrl":"https://doi.org/10.26582/k.52.2.2","url":null,"abstract":"The practice of long- and medium-distance races has exponentially\u0000increased the number of participants in recent years. They are carried out\u0000under extreme conditions that cause both biochemical and anthropometric changes\u0000in athletes and, in addition, have serious risks associated, such as\u0000dehydration, thermal disorders, or hypoglycemia. Knowledge regarding alterations\u0000at hematological level after this type of effort is limited. The objectives of\u0000this pre-post analytical descriptive observational study were: to\u0000describe and compare hematological values in amateur runners pre and post\u0000road marathon and ultratrail races, and to compare the hematological parameters\u0000between the groups in the two times analyzed by means of univariate descriptive\u0000statistical analyses, intra-group pre-post comparisons (Wilcoxon Signed-Rank\u0000Test), and comparisons between the groups (Mann-Whitney U Test). Effect size\u0000was calculated using Cohen’s D. An explanatory model (Multiple Logistic\u0000Regression) was created. Statistical significance was set at p<.05. The Wilcoxon test for marathon runners\u0000observed significant differences (p≤.001) in the white series. In ultratrail runners,\u0000the results were similar, with significant differences (p≤.001) in the platelet\u0000series. The Mann-Whitney U test showed the same pre-race hematological\u0000conditions for both groups, except for hematocrit and corpuscular values\u0000(p≤.001). Significant differences (p≤.001) were also found in the post-race\u0000leukocyte and neutrophil values. Significant differences in hematological\u0000parameters have been observed both between and within the groups. The\u0000differences with greater significance corresponded to the leukocyte series.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43046832","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}
M. Kargarfard, Shadi Tajvand, Alireza Rabbani, F. Clemente, Farzad Jalilvand
It has been well established that plyometric and speed training have positive impacts on fitness parameters in soccer players. The aim of this study was to compare short-term effects of a combined plyometric and speed training implemented on the same or separate days of a week on change of direction (COD), linear speed (LS), and repeated sprint ability (RSA) in young soccer players. Twenty-four male players from the same U19 soccer team were distributed into one control group (CG; n=7, soccer training only) and two experimental groups performing plyometric and speed exercises on the same (CDG; n=8) or separate days (CWG; n=9) during a 6-week preparation period. Very likely moderate within-group COD improvements were observed in the CDG (ES -0.94 [-1.47 to -0.41]) and CWG (ES -0.97 [-1.52 to -0.42]) groups. Possibly small within-group RSA improvements were also observed in the CWG (ES -0.24[-0.64 to 0.16]) and CDG (ES -0.31 [-0.79 to 0.17]) groups. CWG and CDG groups showed possibly small (ES -0.28 [-0.62 to 0.06]) and very likely moderate (ES -0.80 [-1.28 to -0.32]) within-group LS improvements following the intervention, respectively. In between group analysis, a likely moderate (ES 0.71 [0.03 to 1.39]) greater LS improvement was observed in the CDG group than in the CWG group. I t is suggested to supplement normal soccer training with combined plyometric and speed exercises to improve COD, LS, and RSA performance and to implement these exercises in the same session to improve LS with a greater effect.
{"title":"Effects of combined plyometric and speed\u0000training on change of direction, linear speed, and repeated sprint\u0000ability in young soccer players","authors":"M. Kargarfard, Shadi Tajvand, Alireza Rabbani, F. Clemente, Farzad Jalilvand","doi":"10.26582/k.52.1.11","DOIUrl":"https://doi.org/10.26582/k.52.1.11","url":null,"abstract":"It has been well established that plyometric\u0000and speed training have positive impacts on fitness parameters in soccer\u0000players. The aim of this study was to compare short-term effects of a combined\u0000plyometric and speed training implemented on the same or separate days of a\u0000week on change of direction (COD), linear speed (LS), and repeated sprint\u0000ability (RSA) in young soccer players. Twenty-four male players from the same\u0000U19 soccer team were distributed into one control group (CG; n=7, soccer\u0000training only) and two experimental groups performing plyometric and speed\u0000exercises on the same (CDG; n=8) or separate days (CWG; n=9) during a 6-week\u0000preparation period. Very likely moderate within-group COD improvements\u0000were observed in the CDG (ES -0.94 [-1.47 to -0.41]) and CWG (ES -0.97 [-1.52\u0000to -0.42]) groups. Possibly small within-group RSA improvements were\u0000also observed in the CWG (ES -0.24[-0.64 to 0.16]) and CDG (ES -0.31 [-0.79 to\u00000.17]) groups. CWG and CDG groups showed possibly small (ES -0.28 [-0.62\u0000to 0.06]) and very likely moderate (ES -0.80 [-1.28 to -0.32])\u0000within-group LS improvements following the intervention, respectively. In\u0000between group analysis, a likely moderate (ES 0.71 [0.03 to 1.39])\u0000greater LS improvement was observed in the CDG group than in the CWG group. I t is suggested to\u0000supplement normal soccer training with combined plyometric and speed exercises\u0000to improve COD, LS, and RSA performance\u0000and to implement these exercises in the same session to improve LS with a greater effect.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/k.52.1.11","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44314752","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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