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Journal of Human Kinetics

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https://www.readbyqxmd.com/read/29599878/understanding-trail-runners-activity-on-online-community-forums-an-inductive-analysis-of-discussion-topics
#1
Nadège Rochat, Denis Hauw, Gaëlle Gür, Ludovic Seifert
Recreational trail runners often participate in online community forums where they can freely read posted messages, join discussions and/or introduce new discussion topics. This tool can enhance learning as runners connect with other trail runners and reflect on how they can better organize their own practice. Studying forum activity would provide greater insight into the relationship between field practice and dedicated forums. The aim of this study was therefore to detect the topics discussed online by trail runners in order to understand how they collectively look for solutions that help them adapt to issues that emerge during actual practice...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599877/motivational-climate-sport-youth-scale-measurement-invariance-across-gender-and-five-different-sports
#2
Diogo Monteiro, Carla Chicau Borrego, Carlos Silva, João Moutão, Daniel Almeida Marinho, Luís Cid
The aim of this study was to analyze the psychometric properties of the Portuguese version of the Motivational Climate Sport Youth Scale (MCSYSp) and invariance across gender and different sports (swimming, soccer, handball, basketball, futsal). A total of 4,569 athletes (3,053 males, 1,516 females) from soccer (1,098), swimming (1,049), basketball (1,754), futsal (340), and handball (328) participated in this study, with ages between 10 and 20 years (M = 15.13; SD = 1.95). The results show that the original model (two factors/12 items) did not adjust to the data in a satisfactory way; therefore, it was necessary to change the model by removing four items (two from each factor)...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599876/competition-field-perceptions-of-table-tennis-athletes-and-their-performance
#3
Ying-Chieh Liu, Ming-Yueh Wang, Chi-Yueh Hsu
The distinction between positive and negative perceptions is fundamental in perception models. The purpose of this study was to investigate the correlation between field perceptions of table tennis players and the outcome (net result) during the matches in a competition. Experimental data were collected from 10 elite table tennis players and analysed. The results addressed the following three competition field perceptions: (1) before the service, the player's positive perceptions had significant effect on the positive outcome (winning rate) of that service; (2) the perception after the net result of the previous service increased the positive outcome of the next service, and (3) the player's positive/negative perception during the matches affected the win/loss outcome of that competition...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599875/analysis-of-tactical-decisional-and-executional-behaviour-according-to-the-level-of-expertise-in-squash
#4
María Catalán-Eslava, Sixto González-Víllora, Juan C Pastor-Vicedo, Onofre R Contreras-Jordán
The objective of this study was to analyse the differences in tactical principles, decision-making and execution of the return shot and drop shot of squash players at different levels of proficiency. The sample was composed of 80 players, divided into four levels of expertise (first national category, second national category, autonomous regional level and provincial level). The Squash Performance Evaluation Tool was used for recording the level of decision-making and execution. The results revealed that reading of the context of the game improved as the level of the player's expertise of both the return shot and the drop shot increased...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599874/validation-and-reliability-of-the-korean-version-of-the-sport-anxiety-scale-2
#5
Seongkwan Cho, Hunhyuk Choi, Robert C Eklund, Insu Paek
The main purpose of the present study was to examine the validation and reliability of the Korean version of the Sport Anxiety Scale (SAS-2Kr) by evaluating its factorial invariance across gender. A total of 303 Korean collegiate athletes (198 males and 105 females) from 9 sports participated in the study, and they completed the demographic questionnaire and the SAS-2Kr containing 15 items to measure multidimensional trait anxiety and individual differences in the cognitive and somatic anxiety experienced by athletes...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599873/physical-performance-comparison-between-under-15-elite-and-sub-elite-soccer-players
#6
Athos Trecroci, Zoran Milanović, Matteo Frontini, F Marcello Iaia, Giampietro Alberti
The aim of this study was to compare the physical performance profile among young soccer players of different competitive levels. Two teams of elite (n = 22) and sub-elite (n = 22) soccer players at national (highly skilled) and regional (moderately skilled) level were recruited in the study. All participants were tested using a modified Illinois change of direction speed test, a T-drill with and without a ball, a countermovement jump, and a 10-m sprint. The analysis revealed significant differences in favor of elite players in sprint (d = 1...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599872/responsiveness-of-the-countermovement-jump-and-handgrip-strength-to-an-incremental-running-test-in-endurance-athletes-influence-of-sex
#7
Felipe García-Pinillos, Pedro Delgado-Floody, Cristian Martínez-Salazar, Pedro Á Latorre-Román
The present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover, the CMJ and handgrip strength tests were carried out before and after the running test and during different stages of recovery (at the 1st min of recovery (posttest1), 5th min of recovery (posttest2), and 10th min of recovery (posttest3))...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599871/effects-of-different-post-activation-potentiation-warm-ups-on-repeated-sprint-ability-in-soccer-players-from-different-competitive-levels
#8
Javier Sanchez-Sanchez, Alejandro Rodriguez, Cristina Petisco, Rodrigo Ramirez-Campillo, Cristian Martínez, Fábio Y Nakamura
This study aimed to compare the effects of a traditional warm-up with two post-activation potentiation (PAP) warm-up strategies on the repeated sprint ability (RSA) of soccer players from national (NL) and regional (RL) competitive levels. Sixteen young players (NL, n = 8, age = 20.7 ± 1.4 y, body mass = 68.5 ± 7.0 kg, body height = 177.4 ± 5.2 cm; RL, n = 8, age = 20.8 ± 1.0 y, body mass = 68.7 ± 4.0 kg, body height = 176.6 ± 5.6 cm) were recruited to complete a traditional warm-up (CONTROL), a PAP warm-up incorporating squats with a load (~60% 1RM) that allowed a high speed (1 m/s) of movement and a high number of repetitions (PAP-1), and a PAP warm-up with a load (~90% 1RM) that allowed a moderate speed (0...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599870/effect-of-two-different-types-of-olympic-rotation-order-on-cardiovascular-and-metabolic-variables-in-men-s-artistic-gymnastics
#9
Bessem Mkaouer, Monèm Jemni, Helmi Chaabene, Samiha Amara, Ahmad Njah, Mokhtar Chtara
The rotation sequence-order differs from a gymnast to another according to the draw at the time of the qualifying competitions in men's artistic gymnastics. Only the six best gymnasts start on the floor exercises, the others could start on any of the other five apparatuses. It has been demonstrated that some gymnastics events are physiologically less taxing than others; hence some gymnasts could experience lower and/or higher levels of cardiovascular and metabolic stress compared to others, depending on the apparatus they start with...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599869/variables-that-predict-serve-efficacy-in-elite-men-s-volleyball-with-different-quality-of-opposition-sets
#10
Álvaro Valhondo, Carmen Fernández-Echeverría, Jara González-Silva, Fernando Claver, M Perla Moreno
The objective of this study was to determine the variables that predicted serve efficacy in elite men's volleyball, in sets with different quality of opposition. 3292 serve actions were analysed, of which 2254 were carried out in high quality of opposition sets and 1038 actions were in low quality of opposition sets, corresponding to a total of 24 matches played during the Men's European Volleyball Championships held in 2011. The independent variables considered in this study were the serve zone, serve type, serving player, serve direction, reception zone, receiving player and reception type; the dependent variable was serve efficacy and the situational variable was quality of opposition sets...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599868/strength-and-conditioning-coaches-application-of-the-session-rating-of-perceived-exertion-method-of-monitoring-within-professional-rugby-union
#11
Thomas Comyns, Aoife Hannon
Session rating of perceived exertion (session-RPE) is a method of monitoring and managing training loads. The purpose of this study was to research how and for what purpose strength and conditioning (S&C) coaches implement this monitoring method within professional rugby union. The study also aimed to assess if S&C coaches found this monitoring method to be valid and effective. An online survey containing 24 fixed response questions was used to assess how S&C coaches applied the session-RPE method...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599867/variance-in-prominence-levels-and-in-patterns-of-passing-sequences-in-elite-and-youth-soccer-players-a-network-approach
#12
Bruno Mendes, Filipe Manuel Clemente, Nuno Maurício
The aim of this study was to quantify the prominence levels of elite and highly competitive young soccer players. This study also analyzed the variation in general network properties at different competitive levels and periods of the season. A total of 132 matches, played by 28 teams during the 2015/2016 season, were analyzed. The results revealed significant differences in the composition of general network measures considering the competitive level (p = 0.002; ES = 0.077) and according to the location of the match (p = 0...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599866/impact-of-official-matches-on-soccer-referees-power-performance
#13
Daniel Castillo, Javier Yanci, Jesús Cámara
The evaluation of match officials' neuromuscular performance is now an important consideration and the vertical jump test is considered suitable for assessing lower limb power, partly because it is directly related to refereeing. The aim of this study, therefore, was to determine the effect of soccer matches on match officials' vertical jump performance by assessing various biomechanical variables. Eighteen field referees (FRs) and 36 assistant referees (ARs) who officiated in 18 official matches participated in this study...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599865/effect-of-compression-garments-on-physiological-responses-after-uphill-running
#14
Ivan Struhár, Michal Kumstát, Dagmar Moc Králová
Limited practical recommendations related to wearing compression garments for athletes can be drawn from the literature at the present time. We aimed to identify the effects of compression garments on physiological and perceptual measures of performance and recovery after uphill running with different pressure and distributions of applied compression. In a random, double blinded study, 10 trained male runners undertook three 8 km treadmill runs at a 6% elevation rate, with the intensity of 75% VO2max while wearing low, medium grade compression garments and high reverse grade compression...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599864/urinary-steroid-profile-in-ironman-triathletes
#15
Marta Marcos-Serrano, Guillermo Olcina, Carmen Crespo, Darrell Brooks, Rafael Timon
The aim of this study was to determine variations in the urinary steroid profile of triathletes following an Ironman event. A total of 10 male participants (age = 36.0 ± 1.27 years; body height = 179.29 ± 10.77 cm; body mass = 74.50 ± 1.04 kg) completed an Ironman Championship. Urine samples were collected before, immediately after, and 24 hours following the race. Gas chromatography-mass spectrometry (GC/MS) was used to detect and quantify catabolic and anabolic hormones: Androsterone, Dehydroepiandrosteone (DHEA), Androstenedione and Testosterone (T), Betaestradiol, Estrone, Progesterone, Cortisol (C), Cortisone, Tetrahydrocortisol (THE) and Tetrahydrocortisone (THF)...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599863/aerobic-fitness-of-starter-and-non-starter-soccer-players-in-the-champion-s-league
#16
Giorgos Paraskevas, Marios Hadjicharalambous
To identify individual response patterns in selected aerobic fitness variables of regular starters (ST; N = 7) and non-starters (Non-ST; N = 10), top level professional soccer players were tested for maximal oxygen uptake (VO2max), velocity at 4 mM of lactate (V4), velocity at maximal oxygen uptake (νVO2max ) and oxygen pulse (O2 -pulse) in July and December following consecutive periods of fixture congestion. V4 was the only variable that increased significantly in December compared to July (15.1 ± 0.5 vs...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599862/fatigue-responses-in-various-muscle-groups-in-well-trained-competitive-male-players-after-a-simulated-soccer-game
#17
Dan Fransson, Jeppe Foged Vigh-Larsen, Ioannis G Fatouros, Peter Krustrup, Magni Mohr
We examined the degree of post-game fatigue and the recovery pattern in various leg and upper-body muscle groups after a simulated soccer game. Well-trained competitive male soccer players (n = 12) participated in the study. The players completed the Copenhagen Soccer Test, a 2 x 45 min simulated soccer protocol, following baseline measures of maximal voluntary contractions of multiple muscle groups and systemic markers of muscle damage and inflammation at 0, 24 and 48 h into recovery. All muscle groups had a strength decrement ( p ≤ 0...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599861/the-effects-of-aerobic-exercise-and-gaming-on-cognitive-performance
#18
Peter C Douris, John P Handrakis, Demitra Apergis, Robert B Mangus, Rima Patel, Jessica Limtao, Svetlana Platonova, Aladino Gregorio, Elliot Luty
The purpose of our study was to investigate the effects of video gaming, aerobic exercise (biking), and the combination of these two activities on the domains of cognitive performance: selective attention, processing speed, and executive functioning. The study was a randomized clinical trial with 40 subjects (mean age 23.7 ± 1.8 years) randomized to one of four thirty-minute conditions: video gaming, biking, simultaneous gaming and biking, and a control condition. Cognitive performance was measured pre and post condition using the Stroop test and Trails B test...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599860/can-supplementation-of-vitamin-d-improve-aerobic-capacity-in-well-trained-youth-soccer-players
#19
Maria Jastrzębska, Mariusz Kaczmarczyk, Małgorzata Michalczyk, Łukasz Radzimiński, Piotr Stępień, Joanna Jastrzębska, Dorota Wakuluk, Arturo Díaz Suárez, Guillermo Felipe López Sánchez, Paweł Cięszczyk, Piotr Godlewski, Paweł Król, Zbigniew Jastrzębski
There is no clear evidence that vitamin D effectively improves physical capacity in high-level athletes. The aim of this study was to confirm that vitamin D supplementation of soccer players during eight-week high-intensity training would have a significant effect on their aerobic capacity. The subjects were divided into two groups: the experimental one that was supplemented with vitamin D (SG, n = 20), and the placebo group (PG, n = 16), not supplemented with vitamin D. All the players were subjected to the same soccer training described as High-Intensity Interval Training (HIIT)...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599859/functional-movements-in-japanese-mini-basketball-players
#20
Kenji Kuzuhara, Masashi Shibata, Junta Iguchi, Ryo Uchida
Functional movement screen (FMS) has been used to establish normative data and determine potential injury risk for young adults and athletes, but there are few data in elementary school-age children. The purpose of this study was to establish fundamental values for the FMS in elementary school-age mini-basketball players. Secondary purposes were to examine relationships between functional movement patterns and age, peak height velocity (PHV), and body mass index (BMI), and to compare functional movement patterns between boys and girls and between individuals with and without a history of injury...
March 2018: Journal of Human Kinetics
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