This study aimed to investigate the effects of the whole-body vibration (WBV) exercise with and without blood flow restriction (BFR) on heart rate (HR), oxygen saturation (SpO2), and circulating vascular endothelial growth factor (VEGF) response. Ten physically inactive male adults participated in this study and completed WBV (frequency: 26 Hz; amplitude: 4 mm; 10 sets for 1 min, with 1-2 min of rest between sets) and WBV + BFR sessions in a repeated measures crossover design, with a 1-week interval separating the sessions. In the WBV + BFR session, participants wore a BFR device inflated to 140 mmHg on the proximal portion of the thigh muscle. Results indicated that WBV + BFR caused a greater HR response than WBV alone (p .05). Only the WBV + BFR session caused a significant increase in the VEGF response (p<.05), and WBV + BFR elicited a significantly higher VEGF response than did WBV after exercise (p<.05). In conclusion, an acute bout of WBV + BFR exercise magnifies the HR response relative to WBV exercise and induces an increase in circulating VEGF values. These alterations seem unrelated to systematic SpO2.Key words: oxygen saturation, heart rate, physically inactive male adults
{"title":"Effect of acute whole-body vibration exercise with blood flow restriction on vascular endothelial growth factor response","authors":"Wu Chih-Min, Chen Wen-Chyuan, Cai Zong-yan","doi":"10.26582/K.50.2.8","DOIUrl":"https://doi.org/10.26582/K.50.2.8","url":null,"abstract":"This study aimed to investigate the effects of the whole-body vibration (WBV) exercise with and without blood flow restriction (BFR) on heart rate (HR), oxygen saturation (SpO2), and circulating vascular endothelial growth factor (VEGF) response. Ten physically inactive male adults participated in this study and completed WBV (frequency: 26 Hz; amplitude: 4 mm; 10 sets for 1 min, with 1-2 min of rest between sets) and WBV + BFR sessions in a repeated measures crossover design, with a 1-week interval separating the sessions. In the WBV + BFR session, participants wore a BFR device inflated to 140 mmHg on the proximal portion of the thigh muscle. Results indicated that WBV + BFR caused a greater HR response than WBV alone (p .05). Only the WBV + BFR session caused a significant increase in the VEGF response (p<.05), and WBV + BFR elicited a significantly higher VEGF response than did WBV after exercise (p<.05). In conclusion, an acute bout of WBV + BFR exercise magnifies the HR response relative to WBV exercise and induces an increase in circulating VEGF values. These alterations seem unrelated to systematic SpO2.Key words: oxygen saturation, heart rate, physically inactive male adults","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41895157","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}
L. Rodríguez-Lorenzo, M. F. Olmo, José Andrés Sanchez-Molina, Rafael Martín-Acero
Kicking ability in soccer has been evaluated predominantly by the maximum ball velocity. The kicking deficit (KD) may be defined as the percentage of the difference between the maximum ball velocity each player achieved by the non-preferred leg kick in relation to the preferred leg kick. This study aimed to compare: side-to-side kicking velocity, vertical jumps and anthropometrics between the younger (G-14) and older (G+14) than 14 years soccer players. An additional aim was to investigate associations among these variables. Participants were 92 young elite soccer players from the development programme of a top Spanish division club. They were divided into two age groups according to their growth and motor development stages (10.80-13.55 years, n=46; 14.02-16.39 years, n=46). Student’s t-test showed that the maximum kicking velocity with the preferred and non-preferred leg, jumping performance, and all anthropometric measurements were significantly (p<.01) higher in G+14 compared with G-14. In contrast, KD values remained stable (15.31%- 15.83%) without significant differences between the groups. Pearson’s correlation analysis revealed that vertical jump tests and anthropometric measurements correlated with kicking ball velocity produced by the preferred and non-preferred leg. Our results demonstrate that kicking skills are still not consolidated and power factors may be determinant for kicking performance in young soccer players. In addition, the KD may be a constant element for both the under and above 14 years soccer players and could result from an unequal and greater use of the preferred leg in comparison with the non-preferred leg. Key words: ball velocity, skill, performance, jumping, non-preferred leg, strength
{"title":"Kicking ability and kicking deficit in young elite soccer players","authors":"L. Rodríguez-Lorenzo, M. F. Olmo, José Andrés Sanchez-Molina, Rafael Martín-Acero","doi":"10.26582/K.50.2.2","DOIUrl":"https://doi.org/10.26582/K.50.2.2","url":null,"abstract":"Kicking ability in soccer has been evaluated predominantly by the maximum ball velocity. The kicking deficit (KD) may be defined as the percentage of the difference between the maximum ball velocity each player achieved by the non-preferred leg kick in relation to the preferred leg kick. This study aimed to compare: side-to-side kicking velocity, vertical jumps and anthropometrics between the younger (G-14) and older (G+14) than 14 years soccer players. An additional aim was to investigate associations among these variables. Participants were 92 young elite soccer players from the development programme of a top Spanish division club. They were divided into two age groups according to their growth and motor development stages (10.80-13.55 years, n=46; 14.02-16.39 years, n=46). Student’s t-test showed that the maximum kicking velocity with the preferred and non-preferred leg, jumping performance, and all anthropometric measurements were significantly (p<.01) higher in G+14 compared with G-14. In contrast, KD values remained stable (15.31%- 15.83%) without significant differences between the groups. Pearson’s correlation analysis revealed that vertical jump tests and anthropometric measurements correlated with kicking ball velocity produced by the preferred and non-preferred leg. Our results demonstrate that kicking skills are still not consolidated and power factors may be determinant for kicking performance in young soccer players. In addition, the KD may be a constant element for both the under and above 14 years soccer players and could result from an unequal and greater use of the preferred leg in comparison with the non-preferred leg. \u0000Key words: ball velocity, skill, performance, jumping, non-preferred leg, strength","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48407058","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}
The present study aspires to elaborate on the conceptual framework of flow by further elucidating integration and conceptualisation of a relationship between flow and objective and subjective measures of performance. The aims of the study were twofold: (1) to examine the relationship between flow and its key correlates, anxiety, motivation, and perceived ability; (2) to assess whether the relationship between these measures and performance is direct or mediated. Participant sample included a group of cricketers with varying performance level (n = 40) and a group of 20 non-cricket team athletes; all were between 18 and 35 years of age. Their performance was assessed objectively by batting average, along with administering the Dispositional Flow Scale (DFS), Sport Anxiety Scale (SAS), Sport Motivation Scale (SMS), and Perceived Sport Ability (PSA) questionnaires. Results show that the three flow correlates accounted for 77% of dispositional flow variance; individual correlates varied, however, in their predicting power, anxiety: 0%; motivation: 1%; perceived ability: 57%. In addition, total flow and flow correlates accounted for a total of 54% of variance in performance, whereas unique variance of 8% was accounted for by anxiety and perceived ability, each. Notably, flow and two correlates, anxiety and perceived ability, were found to have a direct impact on performance; in contrast, a weak partial mediation of flow was found between motivation and performance. Based on the findings on the flow-performance relationship, expansion of the flow theory is suggested; benefits for advancing intervention research in sport psychology are discussed.
{"title":"Antecedents of flow and the flow-performance relationship in cricket","authors":"S. Koehn, B. Donald, G. Paramei","doi":"10.26582/K.50.2.6","DOIUrl":"https://doi.org/10.26582/K.50.2.6","url":null,"abstract":"The present study aspires to elaborate on the conceptual framework of flow by further elucidating integration and conceptualisation of a relationship between flow and objective and subjective measures of performance. The aims of the study were twofold: (1) to examine the relationship between flow and its key correlates, anxiety, motivation, and perceived ability; (2) to assess whether the relationship between these measures and performance is direct or mediated. Participant sample included a group of cricketers with varying performance level (n = 40) and a group of 20 non-cricket team athletes; all were between 18 and 35 years of age. Their performance was assessed objectively by batting average, along with administering the Dispositional Flow Scale (DFS), Sport Anxiety Scale (SAS), Sport Motivation Scale (SMS), and Perceived Sport Ability (PSA) questionnaires. Results show that the three flow correlates accounted for 77% of dispositional flow variance; individual correlates varied, however, in their predicting power, anxiety: 0%; motivation: 1%; perceived ability: 57%. In addition, total flow and flow correlates accounted for a total of 54% of variance in performance, whereas unique variance of 8% was accounted for by anxiety and perceived ability, each. Notably, flow and two correlates, anxiety and perceived ability, were found to have a direct impact on performance; in contrast, a weak partial mediation of flow was found between motivation and performance. Based on the findings on the flow-performance relationship, expansion of the flow theory is suggested; benefits for advancing intervention research in sport psychology are discussed.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48135714","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}
Mario Kasović, M. Zvonár, L. Gomaz, Filip Bolcevic, Vincent Anton
The aim of this study was to determine the influence of the schoolbag carriage on pattern changes in plantar pressure during walking among schoolchildren in the first grade. The sample consisted of 127 schoolchildren, 48.8% male (N = 62) and 51.2% female (N = 65), with a mean age of 6.7 (± 0.5) years. The mean schoolbag weight was 4.2 kg (± 0.7), which represented a 16.9% (± 3.9) of the body weight, thus exceeds the upper limit of 15% of the body weight and can affect the posture by a general way. This study has shown a statistically significant influence of the school bag on changes in plantar pressure pattern when walking in relation to walking without the schoolbag. Using a t-test for large dependent samples and by setting statistical significance at p ≤ 0.05, a significant increase was noticed in peak pressure for the forefoot (p = .000; 17.1%), midfoot (p = .000; 5.7%) and the hindfoot (p = .004; 3.9%) as well as in average pressure for the midfoot (p = .005; 6.2%). Also, due to the compensatory mechanisms, while carrying the bag, a statistically significant increase in the contact surface at the forefoot (p = .000; 3.6%) and the midfoot (p =. 000, 8.8%) occurs. Changes in the distribution of pressure between the different parts of the foot are a source of potential foot problems which is why the results of this study have a high applicability in the prevention of foot pathology in the future.
{"title":"Influence of schoolbag carriage on pattern changes in plantar pressure during walking among first-grade schoolchildren","authors":"Mario Kasović, M. Zvonár, L. Gomaz, Filip Bolcevic, Vincent Anton","doi":"10.26582/K.50.2.14","DOIUrl":"https://doi.org/10.26582/K.50.2.14","url":null,"abstract":"The aim of this study was to determine the influence of the schoolbag carriage on pattern changes in plantar pressure during walking among schoolchildren in the first grade. The sample consisted of 127 schoolchildren, 48.8% male (N = 62) and 51.2% female (N = 65), with a mean age of 6.7 (± 0.5) years. The mean schoolbag weight was 4.2 kg (± 0.7), which represented a 16.9% (± 3.9) of the body weight, thus exceeds the upper limit of 15% of the body weight and can affect the posture by a general way. \u0000This study has shown a statistically significant influence of the school bag on changes in plantar pressure pattern when walking in relation to walking without the schoolbag. Using a t-test for large dependent samples and by setting statistical significance at p ≤ 0.05, a significant increase was noticed in peak pressure for the forefoot (p = .000; 17.1%), midfoot (p = .000; 5.7%) and the hindfoot (p = .004; 3.9%) as well as in average pressure for the midfoot (p = .005; 6.2%). Also, due to the compensatory mechanisms, while carrying the bag, a statistically significant increase in the contact surface at the forefoot (p = .000; 3.6%) and the midfoot (p =. 000, 8.8%) occurs. Changes in the distribution of pressure between the different parts of the foot are a source of potential foot problems which is why the results of this study have a high applicability in the prevention of foot pathology in the future.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.14","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43415695","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}
G. Conti, Auro Freire Freire, B. Evangelista, G. Pedrosa, Herbert Ugrinowitsch, H. Castro
The present study aimed to characterize and differentiate the predictive factors of the attacks performed by the opposite player from positions 1 and 2. The sample consisted of the observation of 142 volleyball games of the season 2014-2015 of Brazilian Men's Super-League, totaling 8010 actions of reception, setting and attack, where 5965 actions from position 2 and 2045 from position 1 occurred. The analysis of the predictive factors of the attack of the opposite player, according to the position of the attack, showed the attacks from position 2 are more likely to occur after reception B (OR: 1,317), in diagonal (OR: 1.302) or in parallel (OR: 1,548) and to result in blocking of the attack (OR: 1.496). On the other hand, attacks performed from position 1 are more likely to occur after receiving A (OR: 0.458) resulting in a point (OR: 0.709). Thus, situational constraints influenced the predictive factors of the opposite player's attack, according to the attacking position.
{"title":"Brazilian high-level men’s volleyball: characterization of the attack performed by the opposite player","authors":"G. Conti, Auro Freire Freire, B. Evangelista, G. Pedrosa, Herbert Ugrinowitsch, H. Castro","doi":"10.26582/K.50.2.4","DOIUrl":"https://doi.org/10.26582/K.50.2.4","url":null,"abstract":"The present study aimed to characterize and differentiate the predictive factors of the attacks performed by the opposite player from positions 1 and 2. The sample consisted of the observation of 142 volleyball games of the season 2014-2015 of Brazilian Men's Super-League, totaling 8010 actions of reception, setting and attack, where 5965 actions from position 2 and 2045 from position 1 occurred. The analysis of the predictive factors of the attack of the opposite player, according to the position of the attack, showed the attacks from position 2 are more likely to occur after reception B (OR: 1,317), in diagonal (OR: 1.302) or in parallel (OR: 1,548) and to result in blocking of the attack (OR: 1.496). On the other hand, attacks performed from position 1 are more likely to occur after receiving A (OR: 0.458) resulting in a point (OR: 0.709). Thus, situational constraints influenced the predictive factors of the opposite player's attack, according to the attacking position.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42278797","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}
J. Saavedra, I. T. Einarsson, D. Sekulić, A. García-Hermoso
The purpose of this study was to ascertain the pacing strategies employed in 10 km open water swimming events, and to define which split time was most determinant for the final performance as a function of gender and classification in International Championships. Six international competitions over the last five years were analyzed retrospectively: Olympic Games, World Championships, and European Championships. The data corresponded to a total of 437 swimmers' competition histories (257 men, 180 women). A two-way analysis of variance (gender [2 levels: men, women], classification [3 levels: 1st to 3rd, 4th to 8th, 9th and below]) was performed for each split (0-2.5 km, 2.6-5.0 km, 5.1-7.5 km, and 7.6 to 10 km) and halves (0-5 km, 5.1-10 km). The Bonferroni post hoc test was used to compare means, and Pearson's simple correlation coefficient to determine correlations between the split and the final performance (total time). In general the medal winners and those swimmers classified from 4th to 8th place employed a negative pacing strategy (the first half of the race slower than the second), in both men and women. Women, however, in proportional terms have a faster first partial (0 to 2.5 km) than men. These results could help coaches to indicate to the swimmers that the first split of the event should be as slow as possible but guarantying to be in the heading group. Thus, they would be using the aerobic energy mainly, "reserving" energy for the second and decisive split.
{"title":"Analysis of pacing strategies in 10 km open water swimming in international events","authors":"J. Saavedra, I. T. Einarsson, D. Sekulić, A. García-Hermoso","doi":"10.26582/K.50.2.3","DOIUrl":"https://doi.org/10.26582/K.50.2.3","url":null,"abstract":"The purpose of this study was to ascertain the pacing strategies employed in 10 km open water swimming events, and to define which split time was most determinant for the final performance as a function of gender and classification in International Championships. Six international competitions over the last five years were analyzed retrospectively: Olympic Games, World Championships, and European Championships. The data corresponded to a total of 437 swimmers' competition histories (257 men, 180 women). A two-way analysis of variance (gender [2 levels: men, women], classification [3 levels: 1st to 3rd, 4th to 8th, 9th and below]) was performed for each split (0-2.5 km, 2.6-5.0 km, 5.1-7.5 km, and 7.6 to 10 km) and halves (0-5 km, 5.1-10 km). The Bonferroni post hoc test was used to compare means, and Pearson's simple correlation coefficient to determine correlations between the split and the final performance (total time). In general the medal winners and those swimmers classified from 4th to 8th place employed a negative pacing strategy (the first half of the race slower than the second), in both men and women. Women, however, in proportional terms have a faster first partial (0 to 2.5 km) than men. These results could help coaches to indicate to the swimmers that the first split of the event should be as slow as possible but guarantying to be in the heading group. Thus, they would be using the aerobic energy mainly, \"reserving\" energy for the second and decisive split.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44827238","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}
L. Ružić, M. Berkovic, Hrvoje Starčević, D. Lovrić, B. Matkovic
High altitude tourism is becoming increasingly popular among non-athletic population but its potential impact on health is often neglected. This study investigated the changes in male sex hormones after the trek in altitudes between 1400m- and 6476m. 17 recreational lowland men (age 48±11) participated in 26 day Himalaya trek, with the highest point reached being Mera Peak. The initial measurements were performed 10 days before departure and included blood work (total testosterone, sex hormone-binding globulin (SHBG), dehydroepiandrosterone sulfate (DHEA-S), follicle stimulating hormone (FSH) and luteinizing hormone (LH)) and ergometry on treadmill. The final measurements were done 24h after return to 122m (4 days after altitude of 4300m, and 8 days after altitude of 6476m). During the tour SpO2 and heart rate were measured 21 times. An increase in SHBG (42.6±10.6 to 50.7±12.0 nmol·L-1; P=0.011), and subsequent decrease in calculated free testosterone (1.8±0.3 to 1.6±0.3%; P=0.003) were observed. There was a significant correlation between the relative testosterone decrease and SHBG with mean SpO2 (Spearman R=-0.64 and 0.41 respectively). LH and FSH increased significantly (FSH Median;IQR before= 3.9;0.42 and after 4.6;4.0-7.1 IU·L-1; P=0.001 and LH Median/IQR before= 4.8/3.1-5.2 and after 5.9/4.9-9.3 IU·L-1; P=0.008). The changes in LH and FSH did not correlate with SpO2 whereas physical fitness (expressed in MET) did. In conclusion, the pituitary-adrenal-gonadal axis was affected by altitude trek (involving physical exertion and hypoxia in combination) but the origin, duration and the impact of changes on various aspects of men’s health should be further investigated. Key words: altitude, gonadotropins, testosterone, hypoxia
{"title":"Male sex hormones response after a month-long Himalayas trek in relation to hemoglobin oxygen saturation","authors":"L. Ružić, M. Berkovic, Hrvoje Starčević, D. Lovrić, B. Matkovic","doi":"10.26582/K.50.2.18","DOIUrl":"https://doi.org/10.26582/K.50.2.18","url":null,"abstract":"High altitude tourism is becoming increasingly popular among non-athletic population but its potential impact on health is often neglected. This study investigated the changes in male sex hormones after the trek in altitudes between 1400m- and 6476m. 17 recreational lowland men (age 48±11) participated in 26 day Himalaya trek, with the highest point reached being Mera Peak. The initial measurements were performed 10 days before departure and included blood work (total testosterone, sex hormone-binding globulin (SHBG), dehydroepiandrosterone sulfate (DHEA-S), follicle stimulating hormone (FSH) and luteinizing hormone (LH)) and ergometry on treadmill. The final measurements were done 24h after return to 122m (4 days after altitude of 4300m, and 8 days after altitude of 6476m). During the tour SpO2 and heart rate were measured 21 times. An increase in SHBG (42.6±10.6 to 50.7±12.0 nmol·L-1; P=0.011), and subsequent decrease in calculated free testosterone (1.8±0.3 to 1.6±0.3%; P=0.003) were observed. There was a significant correlation between the relative testosterone decrease and SHBG with mean SpO2 (Spearman R=-0.64 and 0.41 respectively). LH and FSH increased significantly (FSH Median;IQR before= 3.9;0.42 and after 4.6;4.0-7.1 IU·L-1; P=0.001 and LH Median/IQR before= 4.8/3.1-5.2 and after 5.9/4.9-9.3 IU·L-1; P=0.008). The changes in LH and FSH did not correlate with SpO2 whereas physical fitness (expressed in MET) did. In conclusion, the pituitary-adrenal-gonadal axis was affected by altitude trek (involving physical exertion and hypoxia in combination) but the origin, duration and the impact of changes on various aspects of men’s health should be further investigated. \u0000 \u0000Key words: altitude, gonadotropins, testosterone, hypoxia","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.18","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48550181","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}
The aim was to establish differences in morphological characteristics of 48 selected female younger cadet (U14) handball players (age 13.88±0.46 years) in the playing positions of wings, backs and pivots. The sample of variables embraced 24 morphological measures defining the already established four latent body dimensions. Univariate ANOVA revealed the significant global differences among the three groups of U14 players in 11 morphological measures. Between the backs and pivots no significant differences were established. The greatest differences between the pivots and wings were established in body height, leg length, arm length, ankle breadth, body weight and calf circumference (p<.01). The greatest differences between the wings and backs were established in four variables: body height, arm length, knee breadth and ankle breadth (p<.01). We endorse the interpretation that specificities of technical-tactical activities executed by backs and pivots in attack repose in the background of the established differences, that is, backs and pivots are exposed to more body contacts in attack in which they must overcome defenders’ resistance. In the sample of the Croatian U14 female handballers apparently no somatotypic component prevailed. However, a slightly larger contribution of endomorph component was perceived in the pivots’ body composition, which was in line with the general results of the entire age group. In U14 backs both the endomorph and mesomorph component were pronounced equally, whereas all the three components were of even values in the wings.
{"title":"Position-related differences in morphological characteristics of u14 female handball players","authors":"Lidija Bojić-Ćaćić, D. Vuleta, D. Milanovic","doi":"10.26582/K.50.2.12","DOIUrl":"https://doi.org/10.26582/K.50.2.12","url":null,"abstract":"The aim was to establish differences in morphological characteristics of 48 selected female younger cadet (U14) handball players (age 13.88±0.46 years) in the playing positions of wings, backs and pivots. The sample of variables embraced 24 morphological measures defining the already established four latent body dimensions. Univariate ANOVA revealed the significant global differences among the three groups of U14 players in 11 morphological measures. Between the backs and pivots no significant differences were established. The greatest differences between the pivots and wings were established in body height, leg length, arm length, ankle breadth, body weight and calf circumference (p<.01). The greatest differences between the wings and backs were established in four variables: body height, arm length, knee breadth and ankle breadth (p<.01). We endorse the interpretation that specificities of technical-tactical activities executed by backs and pivots in attack repose in the background of the established differences, that is, backs and pivots are exposed to more body contacts in attack in which they must overcome defenders’ resistance. In the sample of the Croatian U14 female handballers apparently no somatotypic component prevailed. However, a slightly larger contribution of endomorph component was perceived in the pivots’ body composition, which was in line with the general results of the entire age group. In U14 backs both the endomorph and mesomorph component were pronounced equally, whereas all the three components were of even values in the wings.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.12","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48762435","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}
INTRODUCTION: The purpose of this study was to explore the effects of a 5-min classroom-based physical activity. The search focused on its effects on
引言：本研究的目的是探索5分钟课堂体育活动的效果。搜索的重点是它对
{"title":"Effects of a 5-minute classroom-based physical activity on on-task behaviour and physical activity levels","authors":"Hrvoje Podnar, D. Novak, I. Radman","doi":"10.26582/K.50.2.17","DOIUrl":"https://doi.org/10.26582/K.50.2.17","url":null,"abstract":"INTRODUCTION: The purpose of this study was to explore the effects of a 5-min classroom-based physical activity. The search focused on its effects on","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.17","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48648064","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}
J. Courel-Ibáñez, Allistair P. McRobert, E. O. Toro, D. C. Vélez
The inside game constitutes an essential aspect of modern basketball, particularly in the National Basketball Association (NBA), in where the best players of the world compete. The purpose of this study was to identify players’ dynamics that increase game performance when using inside pass in the NBA, considering game contextual effects. The sample included 808 inside passes from 25 randomly selected matches of the 2011 NBA Playoffs series. A series of logistic regression analyses were used to analyse passers and receivers’ actions and their effectiveness during inside passes, both isolated and combined. Main results revealed that the interactions combining passer’s previous actions (dribbling or faking) with receiver’s cuts towards the basket achieved the highest offensive effectiveness. Performing screens in favour to the receiver was an effective alternative to increase inside passing options since it reduces the defensive pressure. Furthermore, player’s actions prior to passing the ball were even more successful if combined and synchronized with the receivers’ displacements, especially cutting to the basket. This information allows a better understanding of basketball collective strategies, contributing to the design of precise practice tasks and so improving the training process.
{"title":"Inside game effectiveness in nba basketball: analysis of collective interactions","authors":"J. Courel-Ibáñez, Allistair P. McRobert, E. O. Toro, D. C. Vélez","doi":"10.26582/K.50.2.5","DOIUrl":"https://doi.org/10.26582/K.50.2.5","url":null,"abstract":"The inside game constitutes an essential aspect of modern basketball, particularly in the National Basketball Association (NBA), in where the best players of the world compete. The purpose of this study was to identify players’ dynamics that increase game performance when using inside pass in the NBA, considering game contextual effects. The sample included 808 inside passes from 25 randomly selected matches of the 2011 NBA Playoffs series. A series of logistic regression analyses were used to analyse passers and receivers’ actions and their effectiveness during inside passes, both isolated and combined. Main results revealed that the interactions combining passer’s previous actions (dribbling or faking) with receiver’s cuts towards the basket achieved the highest offensive effectiveness. Performing screens in favour to the receiver was an effective alternative to increase inside passing options since it reduces the defensive pressure. Furthermore, player’s actions prior to passing the ball were even more successful if combined and synchronized with the receivers’ displacements, especially cutting to the basket. This information allows a better understanding of basketball collective strategies, contributing to the design of precise practice tasks and so improving the training process.","PeriodicalId":49943,"journal":{"name":"Kinesiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.26582/K.50.2.5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47414530","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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