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Journal of Human Kinetics

Michal Wilk, Artur Golas, Petr Stastny, Monika Nawrocka, Michal Krzysztofik, Adam Zajac
Volume and intensity of exercise are the basic components of training loads, having a direct impact on adaptive patterns. Exercise volume during resistance training has been conventionally evaluated as a total number of repetitions performed in each set, regardless of the time and speed of performing individual exercises. The aim of this study was to evaluate the effect of varied tempos i.e. regular (REG) 2/0/2/0, medium (MED) 5/0/3/0 and slow (SLO) 6/0/4/0 during resistance exercise on training volume, based on the total number of performed repetitions (REPsum1-5 ) and time under tension (TUTsum1-5 )...
June 2018: Journal of Human Kinetics
Kai Shiau, Te Hung Tsao, Chang Bin Yang
This study examined the effects of one single bout daily versus triple bouts of resistance exercise for 12 weeks on muscular strength and anaerobic performance of the upper body. Twenty young male adults (age: 22.0 ± 1.0 years, bench press: 44.0 ± 10.3 kg) were randomly assigned to a single bout (SB) or triple bouts (TB) of resistance exercise group. Maximal strength and anaerobic performance of the upper body using the bench press (one-repetition maximum) and the modified 30 s Wingate test were determined before and after the intervention...
June 2018: Journal of Human Kinetics
Jose M Saavedra, Sveinn Þorgeirsson, Milan Chang, Hafrún Kristjánsdóttir, Antonio García-Hermoso
Sports performance analysis has been a growing field of study in the last decade. However, the number of studies in handball is small. The aims of this present study were (i) to compare handball game-related statistics by the match outcome (winning and losing teams) and (ii) to identify characteristics that discriminated performance in elite women's handball. The game-related statistics of the 236 matches played in the last four Olympic Games (Athens, Greece, 2004; Beijing, China, 2008; London, United Kingdom, 2012; and Rio de Janeiro, Brazil, 2016) were analysed...
June 2018: Journal of Human Kinetics
Paulo E Redkva, Mauro R Paes, Ricardo Fernandez, Sergio G da-Silva
The aim of this study was to investigate possible correlations between aerobic and anaerobic fitness (in field tests) with performance during a 90 min friendly match, through the following variables: total distance covered, maximal running speed, number of high-intensity actions and number of sprints. Eighteen professional soccer players from a Brazilian elite team (age 23 ± 3 years, body mass 77.5 ± 8.9 kg) participated in the study. The athletes performed a Yo-Yo Endurance Test (aerobic fitness) and a Running Anaerobic Sprint Test (six maximal 35 m efforts separated by 10 s of passive recovery, anaerobic fitness)...
June 2018: Journal of Human Kinetics
Iván Prieto-Lage, M A Prieto, Thomas P Curran, Alfonso Gutiérrez-Santiago
The goal of this study was to present an accurate and rapid detection system to identify patterns in tennis, based on t-pattern analysis. As a case study, the break point situations in the final matches of the clay court tournaments played during the seasons 2011 and 2012 between the tennis players Novak Djokovic and Rafael Nadal were chosen. The results show that Nadal achieves a higher conversion rate with respect to Djokovic in the break point situations, independent of the outcome of the match. Some repetitive patterns of both players were revealed in break point circumstances...
June 2018: Journal of Human Kinetics
Alba Práxedes, Fernando Del Villar, David Pizarro, Alberto Moreno
The aim of this study was to analyze the effect of a teaching program, based on Non-Linear Pedagogy, on decision-making and performance in youth soccer players as a function of the type of play action. Our participants were 19 players from the U12 age category. The teaching program, which was based on the application of modified games characterized by a numerical superiority in attack, was used for 14 training sessions. This program was conducted in two phases (preparation-for-intervention and intervention)...
June 2018: Journal of Human Kinetics
Adam Lee Owen, Carlos Lago-Peñas, Gordon Dunlop, Rouissi Mehdi, Moktar Chtara, Alexandre Dellal
The primary aim of the investigation was to study the seasonal changes in body composition in elite European soccer players and identify key playing positional differences. Twenty-two players (age = 24 ± 3.7 years, body height = 180.45 ± 5.12 cm, body mass = 76.66 ± 5.34 kg) were tested. Players' mass (kg), lean body mass (LBM), fat free mass (FFM), fat mass (FM), muscle girths (MG) and sum of 8 skinfolds (mm) were measured across 5 time points (T0 = Start of pre-season training; T1 = End of pre-season training; T2 = Mid-season; T3 = End of mid-season break; T4 = End of season)...
June 2018: Journal of Human Kinetics
Javier Sanchez-Sanchez, Rodrigo Ramirez-Campillo, Manuel Carretero, Victor Martín, Daniel Hernández, Fabio Y Nakamura
In order to investigate the physical demands of widely used in soccer small-sided games (SSGs), we compared game variations performed under different interval (fixed or variable) and timing regimens (beginning or end of a training session). Twelve male players wore GPS devices during the SSGs to record total distance, relative distance, distance at different speeds, and maximum velocity variables. Four variations of SSGs (4x4) were randomly applied: beginning of a training session with fixed and variable recovery, or end of a training session with fixed and variable recovery...
June 2018: Journal of Human Kinetics
Daniel Jara, Enrique Ortega, Miguel-Ángel Gómez, Pilar Sainz de Baranda
The aim of this paper was to determine how the size of the pitch affected technical and tactical actions of the goalkeeper when playing small-sided games. The participants were 13 male youth players, including 3 goalkeepers. Three different pitch sizes were used (62 x 44 m; 50 x 35 m; 32 x 23 m). On each pitch, the players played three matches of 8 minutes, with 5-minute breaks between matches. Numerous variables were recorded and examined: defensive and offensive technical and tactical actions, opponent's shooting zone, length and zone of the offensive action, and goal zone where the shoot was directed...
June 2018: Journal of Human Kinetics
Bruno Gonçalves, Hugo Folgado, Diogo Coutinho, Rui Marcelino, Del Wong, Nuno Leite, Jaime Sampaio
Success in soccer is much dependent on how players and teams create and restrict space and time. In match situations, players constitute small sub-groups to improve their collective synchronization and achievement of specific goals. This study aimed to identify changes in the effective playing space (EPS, defined as the smallest polygonal area delimited by the peripheral outfield players) when considering sub-groups of 3 to 10 players. Twenty outfield professional players participated in this study. The EPS, its regularity pattern (measured by the approximate entropy), coefficient of variation and players' mean speed were calculated for sub-groups of 3, 4, 5, 6, 7, 8, 9 and 10 players, considering the smallest inter-player distance as the criterion...
June 2018: Journal of Human Kinetics
Miguel-Ángel Gómez, Simcha Avugos, Miguel-Ángel Oñoro, Alberto Lorenzo, Michael Bar-Eli
It has been previously observed that basketball free-throw (FT) shooting efficiency decreases towards the end of the game. The aim of the current study was to explore possible determinants for this distinctive pattern during close games (point differential of equal or under 2 points during the final minute of the game). A sample of shots attempted by 92 players in the Spanish professional basketball league (ACB) was collected. Several personal (age, experience, playing position and career FT percentage) and contextual (team ability, competition stage, game location, seconds remaining and score differential) variables were considered for the analysis of the data...
June 2018: Journal of Human Kinetics
María Cañadas, Miguel-Ángel Gómez, Javier García-Rubio, Sergio J Ibáñez
Scientific literature has stated the presence of various stages in athletes sportive development, with different objectives in each one of them. This should lead coaches to different training plans according to the athlete's formation stage. The aim of this study was to analyse training plans and identify differences in basketball objectives according to formative stages (U'12 and U'14) in boys and girls. A total of 1,976 training tasks were collected and analysed, for a total of four teams (girls and boys of U'12 and U'14 categories) during an entire season...
June 2018: Journal of Human Kinetics
Raúl Hileno, Antonio García-de-Alcaraz, Bernat Buscà, Cristòfol Salas, Oleguer Camerino
In volleyball, attack coverage is one of the play actions most neglected in coaching and research. The purpose of this study was to find out which attack coverage systems are used by high-level men's teams in different game situations and the characteristics of the most effective systems. We analysed 15 matches from the 2010 Men's Pan-American Volleyball Cup, with a total of 1,415 coverage actions. Chi-square tests for independence, adjusted residuals analysis and calculations of standardised mean difference were performed...
June 2018: Journal of Human Kinetics
Marco Beato, Mikael Jamil, Gavin Devereux
The Video Tracking multiple cameras system (VTS) is a technology that records two-dimensional position data (x and y) at high sampling rates (over 25 Hz). The VTS is of great interest because it can record external load variables as well as collect technical and tactical parameters. Performance analysis is mainly focused on physical demands, yet less attention has been afforded to technical and tactical factors. Digital.Stadium® VTS is a performance analysis device widely used at national and international levels (i...
June 2018: Journal of Human Kinetics
Nuno Batalha, Sónia Dias, Daniel A Marinho, José A Parraca
The continuous execution of swimming techniques, supported mainly by the upper limbs, may cause shoulder rotator muscle imbalances, which leads to injuries. The aim of this study was to evaluate and compare the effects of two training programs on strength, balance and endurance of shoulder rotator cuff muscles in youth swimmers. Twenty-five male swimmers were evaluated and randomly divided into two groups - the land group (n = 13), which conducted a conventional dry-land training program with elastic bands, and the water group (n = 12), which conducted a water resistance program...
June 2018: Journal of Human Kinetics
Mateusz Radojewski, Tomasz Podgórski, Barbara Pospieszna, Jakub Kryściak, Ewa Śliwicka, Joanna Karolkiewicz
The aim of the study was to evaluate the impact of the competitive phase on physiological and metabolic indices and selected markers of skeletal muscle damage in male volleyball players. The study group consisted of 24 young male volleyball players. During the study, participants underwent two series of measurements, before and after the competitive phase of the annual training cycle. In both study terms, players performed an incremental treadmill running test to determine their ventilatory threshold and maximal oxygen uptake...
June 2018: Journal of Human Kinetics
Antonio Miguel Cruz-Ferreira, Eduardo Miguel Cruz-Ferreira, Pedro Barbosa Ribeiro, Luiz Miguel Santiago, Luis Taborda-Barata
Rugby union has one of the highest injury incidence rates in team sports, however, most of the available data focus on the epidemiology of injuries in countries where rugby is popular. We aimed to report the incidence rate and relevant epidemiological aspects of injuries occurred in a group of Portuguese male rugby players. A prospective cohort study was conducted with a group of 45 senior and 32 under-18 male players (total of 77 players). Outcome measures included injury incidence, position, type, location and severity of injuries...
June 2018: Journal of Human Kinetics
Ewelina Lulińska-Kuklik, Masouda Rahim, Daria Domańska-Senderowska, Krzysztof Ficek, Monika Michałowska-Sawczyn, Waldemar Moska, Mariusz Kaczmarczyk, Michał Brzeziański, Ewa Brzeziańska-Lasota, Paweł Cięszczyk, Alison V September
Collagen alpha-1(V) chain, encoded by the COL5A1 gene, plays a crucial role in abundant fibrillar collagens supporting many tissues in the body containing type I collagen and appears to regulate the association between heterotypic fibers composed of both type I and type V collagen occurring among others in muscles, tendons and ligaments. Taking this fact into consideration we decided to examine the association between COL5A1 rs12722 and rs13946 polymorphisms, individually and as inferred haplotypes, with anterior cruciate ligament rupture risk (ACLR) in professional soccer players...
June 2018: Journal of Human Kinetics
Romain Bouzigon, Gilles Ravier, Benoit Dugue, Frederic Grappe
Partial-body cryostimulation is used to improve recovery after exercise, especially during competitions or heavy training; however, a limited number of studies have been conducted with international-level athletes in situ during competitions. This study was undertaken to assess the thermal sensation ratings during 3 min of cold exposure (at -130°C) in 24 international-level athletes during the European Basketball Championship. The mean thermal sensation score, measured using a perceptive scale, increased significantly (p < 0...
June 2018: Journal of Human Kinetics
Roland van den Tillaar, Atle Hole Saeterbakken
The purpose of this study was to compare core muscle activation during a prone bridge (plank) until failure and 6-RM back squats. Twelve resistance-trained males (age 23.5 ± 2.6 years, body mass 87.8 ± 21.3 kg, body height 1.81 ± 0.08 m) participated in this study. Total exercise time and EMG activity of the rectus abdominis, external abdominal oblique and erector spinae were measured during 6-RM back squats and a prone bridge with a weight of 20% of participants' body mass on their lower back. The main findings showed non-significant differences between the exercises in the rectus abdominis or external oblique, but greater erector spinae activation in squatting...
June 2018: Journal of Human Kinetics
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