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Success to Clear the Bar in Elite Pole Vaulters is Affected by Step Frequency Perturbation. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Apostolos S Theodorou,Vassilios Panoutsakopoulos,Timothy A Exell,Johan Cassirame,Hervé Sanchez,Mariana C Kotzamanidou
The purpose of the study was to identify the interaction of step characteristics, along with the direction and magnitude of their asymmetry of elite male and female pole vaulters between successful and failed attempts. It was hypothesized that step characteristics and the magnitude of asymmetry between the two legs would interact with the outcome of the attempt. The approach runs of 12 pole vaulters
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The Features of Foot Morphology and Intrinsic Foot Muscle Property in Adolescent Swimmers: An Ultrasound-Based Study. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Kazuki Kaneda,Noriaki Maeda,Yasunari Ikuta,Tsubasa Tashiro,Shogo Tsutsumi,Satoshi Arima,Junpei Sasadai,Yuta Suzuki,Masanori Morikawa,Makoto Komiya,Nobuo Adachi,Yukio Urabe
This cross-sectional study aimed to investigate the relationship between foot shape and intrinsic foot muscles (IFMs) in adolescent swimmers compared with other athletes. Foot morphology of swimmers was compared with other athletes of comparable age and a competition level (n = 32 [64 feet]; a total of 64 feet; 128 feet in two groups). Foot morphology and variables of IFMs were measured using a three-dimensional
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What Variables Allow the Differentiation between More and Less Successful Adolescent Volleyball Players? J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Mario Albaladejo-Saura,Raquel Vaquero-Cristóbal,Juan A García-Roca,Francisco Esparza-Ros
Kinanthropometric and physical fitness variables have been habitually used for the detection of sports talent in adolescent populations. Considering these variables, players who obtained better scores than their peers in kinanthropometric and physical fitness variables have been traditionally selected for promotion in their teams, without taking into account the possible effect of the maturation process
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Post-Activation Performance Enhancement as a Strategy to Improve Bench Press Performance to Volitional Failure. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Arkaitz Garbisu-Hualde,Laura Gutierrez,Jordan Santos-Concejero
Post-Activation Performance Enhancement (PAPE) has been commonly used as a strategy to improve acute force production, although its effects on performance to volitional failure are still unknown. The aim of this study was to analyse the influence of a PAPE protocol on bench press performance in a training set to volitional failure in trained individuals. Fourteen participants with at least two years
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Comparison of Hip and Knee Biomechanics during Sidestep Cutting in Male Basketball Athletes with and without Anterior Cruciate Ligament Reconstruction. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Pinyada Warathanagasame,Prasert Sakulsriprasert,Komsak Sinsurin,Jim Richards,Jamie S McPhee
This study aimed to compare hip and knee biomechanics during sidestep cutting on the operated and non-operated sides in individuals with anterior cruciate ligament reconstruction (ACLR), and in an uninjured control group. Twenty male basketball athletes, 10 individuals with ACLR and 10 controls, were recruited. Hip and knee joint angles and angular velocities were investigated with a three-dimensional
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Plyometric Training Practices of Brazilian Olympic Sprint and Jump Coaches: Toward a Deeper Understanding of Their Choices and Insights. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Irineu Loturco,Lucas A Pereira,Tomás T Freitas,Túlio B M A Moura,Valter P Mercer,Victor Fernandes,Neilton S A Moura,Nélio A Moura,Adam Zając,Chris Bishop
Plyometric training is extensively used by coaches to enhance neuromuscular performance in a wide variety of sports. Due to the high demands of sprint speed and power output in elite sprinters and jumpers, sprint and jump coaches are likely to have great knowledge on this topic. Undoubtedly, this expertise is even more pronounced for Olympic coaches, who work with some of the fastest and most powerful
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Genetic Determinants of the Anterior Cruciate Ligament Rupture in Sport: An Up-to-Date Systematic Review. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Zhuo Sun,Paweł Cięszczyk,Kinga Humińska-Lisowska,Monika Michałowska-Sawczyn,Shuqi Yue
Anterior cruciate ligament injuries (ACLIs) are one of the most common knee injuries in sports. Although numerous factors have been related to the risk of ACLIs, it is still unclear why some individuals are more susceptible than others due to the intricate etiology of ACLIs. Several genetic factors have been identified as contributing to ACLIs. This systematic review summarizes the current evidence
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Evolution of Tactics in Professional Soccer: An Analysis of Team Formations from 2012 to 2021 in the Spanish LaLiga. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Joaquín González-Rodenas,Víctor Moreno-Pérez,Roberto López-Del Campo,Ricardo Resta,Juan Del Coso
The aim of this investigation was to explore the evolution of team formations (TFs) in a top national professional soccer league. A comparative analysis of a total of 3420 matches was performed in 32 professional soccer teams that competed from the 2012/13 to the 2020/21 season in the Spanish LaLiga. The frequency distribution of TFs across seasons presented a statistically significant change (p <
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Small-Sided Games versus Continuous Endurance Training in Female Handball Players. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Jan Bělka,Karel Hůlka,Michal Šafář
The main aim of the study was to compare the training methods of continuous endurance training versus handball small-sided games (SSGs) in female handball players during the preseason. Eighteen female handball players from a first league in the Czech Republic voluntarily participated in the study. They were divided into two groups (the SSG group [n = 9; age: 21.22 ± 3.03 years] and a running group
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Validity, Reliability, and Sensitivity of Mobile Applications to Assess Change of Direction Speed. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Hüseyin Şahin Uysal,Alex Ojeda-Aravena,Mehmet Ulaş,Eduardo Báez-San Martín,Rodrigo Ramirez-Campillo
This study aimed to assess the validity, reliability, and sensitivity of mobile applications for assessing change-of-direction speed (CODS) performance. Thirty college athletes performed two Illinois CODS tests during one session. Assessments were carried out simultaneously using six devices (the CODTimer app, Seconds Count app, StopwatchCamera app, two analog stopwatches, and timing gates). Validity
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Relationship between Asymmetry Profiles and Jump Performance in Youth Female Handball Players. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Maria Cadens,Antoni Planas-Anzano,Xavier Peirau-Terés,Chris Bishop,Daniel Romero-Rodríguez,Marc Madruga-Parera
The relationships between asymmetries and performance or the identification of the asymmetry profile that has been routinely studied during jumping tests are largely derived from male-only and small sample size studies. Therefore, the aims of this study were: 1) to evaluate the magnitude and the direction of jump asymmetries (vertical and lateral) in three different age groups of adolescent female
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Lower Fatigue in the Eccentric than the Concentric Phase of a Bench Press Set Executed with Maximum Velocity to Failure Against Both Heavy and Light Loads. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Athanasios Tsoukos,Gregory C Bogdanis
We examined changes in barbell velocity and surface electromyographic activity (sEMG) during the concentric (CON) and eccentric (ECC) phases of a bench press set. Ten men executed a set to instant exhaustion as fast as possible, against a low (40% 1-RM) and a heavy load (80% 1-RM), one week apart. The reduction in mean barbell velocity was lower in the ECC compared with the CON phase for both loads
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Regional Hypertrophy: The Effect of Exercises at Long and Short Muscle Lengths in Recreationally Trained Women. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Aitor Zabaleta-Korta,Eneko Fernández-Peña,Jon Torres-Unda,Maider Francés,Asier Zubillaga,Jordan Santos-Concejero
The aim of the present study was to analyse the role of exercises' resistance profile in regional hypertrophy. Thirty-eight healthy women completed a 9-week resistance training program consisting of either 4 sets of 12 repetitions to volitional failure of inclined bicep curls (INC group) or preacher curls (PREA group), three times per week. Pre- and post-intervention muscle thickness was measured using
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Trend Change Analysis as a New Tool to Complement the Evaluation of Human Body Balance in the Time and Frequency Domains. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Piotr Wodarski
Trend change analysis is a tool that complements the assessment of human body stability and provides information on the number and frequency of postural corrections during an examination. The present research aims to determine the possibility of using this method of analysis to investigate postural stability during tests of standing with open eyes (OE) and closed eyes (CE). A total of 118 participants
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Intra-Session Reliability of Sprint Performance on a Non-Motorised Treadmill for Healthy Active Males and Females. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Kenji Doma,Jonathan D Connor,Fabio Y Nakamura,Anthony S Leicht
This study examined the intra-session reliability of sprint performance on a non-motorized treadmill amongst healthy, active male and female adults. One hundred and twenty participants (males n = 77; females n = 45) completed two familiarization sessions, followed by a third session that consisted of three trials (T1, T2, T3) of maximal sprints (4-s), interspersed by three minutes of recovery. Combining
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Effectiveness of Eccentric Overload Training in Basketball Players: A Systematic Review. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Omar Younes-Egana,Juan Mielgo-Ayuso,Marko D M Stojanović,Stephen P Bird,Julio Calleja-González
Several studies have confirmed the efficacy of flywheel eccentric overload training in order to improve or increase muscle volume and strength, as well as several performance-related fitness attributes, but to date, there are no studies that have reviewed the effects of these training methods in basketball. Therefore, the present systematic review aimed to collect the updated information about the
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Effects of 4-Week Low-Load Resistance Training with Blood Flow Restriction on Muscle Strength and Left Ventricular Function in Young Swimmers: A Pilot Randomized Trial. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Zhenhuan Wang,Muhammed M Atakan,Burak Acar,Rui Xiong,Li Peng
Low-load resistance training combined with blood flow restriction (BFR) is known to result in muscle hypertrophy and strength similar to that observed with higher loads. However, the effects of resistance training with BFR on cardiac structure and cardiac function remain largely unknown. Therefore, the purpose of this randomized study was to compare the effects of conventional high-load resistance
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Foot Pronation Prediction with Inertial Sensors during Running: A Preliminary Application of Data-Driven Approaches. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Liangliang Xiang,Yaodong Gu,Alan Wang,Vickie Shim,Zixiang Gao,Justin Fernandez
Abnormal foot postures may affect foot movement and joint loading during locomotion. Investigating foot posture alternation during running could contribute to injury prevention and foot mechanism study. This study aimed to develop feature-based and deep learning algorithms to predict foot pronation during prolonged running. Thirty-two recreational runners have been recruited for this study. Nine-axial
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The Impact of Acute Mild Normobaric Hypoxia and a Single Bout of Exercise to Volitional Exhaustion on Cognitive Performance in Endurance and Strength-Trained Athletes: The role of BDNF, EP-1, Catecholamines and Lactate. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Zofia Piotrowicz,Miłosz Czuba,Małgorzata Chalimoniuk,Józef Langfort
The aim of the study was to examine whether a single bout of exercise to volitional exhaustion, performed under moderate normobaric hypoxia (H), would affect psychomotor performance (PP) in differently trained athletes. For this purpose, ten strength-trained (S) athletes, ten endurance-trained (E) athletes and ten healthy men leading a sedentary lifestyle as a control (C) group performed voluntarily
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External Load Monitoring in Female Basketball: A Systematic Review. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-07-15 Javier Espasa-Labrador,Julio Calleja-González,Alicia M Montalvo,Azahara Fort-Vanmeerhaeghe
The primary aim of this systematic review was to summarize the current state of research in relation to external load monitoring in female basketball. The review was conducted according to the PRISMA-P® statement. Publications included in the review: 1) were original research, 2) evaluated healthy female basketball players, and 3) monitored basketball practice and competition. The STROBE scale was
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Predicting Total Back Squat Repetitions from Repetition Velocity and Velocity Loss. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Michael H Haischer,Joseph P Carzoli,Daniel M Cooke,Joshua C Pelland,Jacob F Remmert,Michael C Zourdos
The purpose of this investigation was to determine if average concentric velocity (ACV) of a single repetition at 70% of one-repetition maximum (1RM), ACV of the first repetition of a set to failure at 70% of 1RM, or the velocity loss during the set could predict the number of repetitions performed in the back squat. Fifty-six resistance-trained individuals participated in the study (male = 41, age
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Internal and External Loads of Young Elite Soccer Players during Defensive Small-Sided Games. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Alberto Rabano-Muñoz,Luis Suarez-Arrones,Bernardo Requena,Jose A Asian-Clemente
The aim of this study was to evaluate the effects of different time periods on the internal and external loads of soccer players during small-sided games (SSGs). Seventeen young soccer players performed a SSG of 5 vs. 5 + 5 with 2 floaters, where two teams had possession of the ball, and one had to recover it. With established periods of 30 s (SSG30), 1 min (SSG1) or 2 min (SSG2), teams participated
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Tensiomyographic Assessment of Contractile Properties in Elite Youth Soccer Players According to Maturity Status. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Alexis Padrón-Cabo,Francisco J Corredoira,Miguel Lorenzo-Martínez,Sixto González-Víllora,Ezequiel Rey
Little is known about how muscle contractile properties are affected by biological maturation in elite youth soccer players. This study aimed to determine the effects of maturation on contractile properties of rectus femoris (RF) and biceps femoris (BF) muscles assessed by tensiomyography (TMG) and provide reference values for elite youth soccer players. One hundred twenty-one elite youth soccer players
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Training in a Hot Environment Fails to Elicit Changes in the Blood Oxidative Stress Response. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Cassie M Williamson-Reisdorph,Tiffany S Quindry,Katherine S Christison,Shae C Gurney,Kathryn G Tiemessen,John Cuddy,Walter Hailes,Dustin Slivka,Brent C Ruby,John C Quindry
Environmental temperature can impact exercise-induced blood oxidative stress; however, the effects of heat acclimation on this response have not been fully elucidated. The purpose of the study was to investigate the effects of hot (33°C) and room temperature (20°C) environments on post-exercise blood oxidative stress responses following 15 temperature acclimation sessions. Untrained participants (n
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Intermittent Voluntary Isometric Contractions Effects on Performance Enhancement and Sticking Region Kinematics in the Bench Press. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Arkaitz Garbisu-Hualde,Laura Gutierrez,Eneko Fernández-Peña,Jordan Santos-Concejero
During the last years, post-activation performance enhancement (PAPE) has gained notorious popularity due to the capacity to improve the acute rate of force development (RFD) using different strategies with different muscle contraction regimes as conditioning stimuli. The aim of the present study was to analyse the role of a maximal isometric post-activation performance enhancement (PAPE) protocol
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Horizontal Foot Speed During Submaximal and Maximal Running. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Kenneth P Clark,Laurence J Ryan,Christopher R Meng,David J Stearne
Horizontal foot speed is fundamental for running synchronization and stability, and may also be important for sprinting performance. In this investigation, we quantified the following during steady-speed running: (a) peak forward foot speed during the swing phase, (b) backward foot speed at touchdown, and (c) ground speed difference (GSD), i.e., the difference between forward running speed and backward
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Change-of-Direction Speed in Firefighter Trainees: Fitness Relationships and Implications for Occupational Performance. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Robert G Lockie,Robin M Orr,Fernando Montes,J Jay Dawes
Change-of-direction (COD) speed and ability could assist a firefighter moving about the fire ground more efficiently. There has been limited investigations of COD speed in firefighter trainees, and what measures of fitness could contribute to faster performance in a test such as the Illinois agility test (IAT), which measures longer COD speed. This study analyzed archival data from 292 trainees (262
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Motivated and without Fear of Failure: The Strength of Basic Psychological Needs in Youth Spanish Athletes in Team Sports. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Juan González-Hernández,Manuel Gómez-López,David Manzano-Sánchez,Alfonso Valero-Valenzuela
Connecting desires for achievement, the satisfaction of basic psychological needs and the perception of fear of failure is one of the most relevant questions in the understanding of negative mental responses in youth athletes. How to act with less fear is what every athlete seeks to feel to enhance their performance actions. This paper aims to shed light on a sample of 681 members of sports teams belonging
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Peak Running, Mechanical, and Physiological Demands of Professional Men's Field Hockey Matches. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Liya Lin,Xinyi Ji,Li Zhang,Haiqin Weng,Xinyi Wang
The aim of this study was to investigate the peak running, mechanical, and physiological demands of players of different positions in professional men's field hockey matches. Eighteen professional male field hockey players participated in the study, and data were collected in eleven official matches. Players wore GPS units (Vector S7, Catapult Sports) and heart rate (HR) monitors (Polar H1, Polar Electros)
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The Effects of a 10-Week Aerobic and Unilateral Lower Extremity Resistance Training Program on Amplitude and Nerve Conduction Velocity of Sensory and Motor Nerves in Diabetic Patients with Neuropathy. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Sharif Beigi,Fatemeh Shabkhiz,Mohammadreza Kordi,Bahram Haghi-Ashtiani,Nahid Hashemi-Madani,Piotr Zmijewski
This study aimed to investigate the effects of 10-week aerobic and unilateral lower extremity resistance training on nerve conduction velocity and amplitude of sensory and motor nerves in diabetic patients with neuropathy. This clinical trial was conducted on twenty women and men (aged 30-60 years old) with diabetic neuropathy. Participants were randomly assigned to one of the two groups: an exercise
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Rating of Perceived Exertion in Professional Volleyball: A Systematic Review. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 André Rebelo,João R Pereira,Diogo V Martinho,João Valente-Dos-Santos
The rating of perceived exertion (RPE) is a non-invasive, cost effective, and time efficient strategy to measure training loads. However, data can be collected without following specific procedures and across a range of methods (e.g., different RPE scales and/or different operational questions). Consequently, practitioners working in professional volleyball can use this information in various ways
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A Comparison of Basic Training Variables in the Standard and Cambered Bar Bench Press Performed to Volitional Exhaustion. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Patryk Matykiewicz,Michał Krzysztofik,Adam Zając
The objective of this study was to compare the impact of cambered and standard barbells used during the bench press exercise on the number of performed repetitions and mean velocity during a bench press training session that included 5 sets performed to volitional failure at 70% of one-repetition maximum (1RM) (for each barbell type). An additional objective was to determine whether there would be
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Functional Movement Patterns, Spinal Posture and Prevalence of Musculoskeletal Symptoms among Elite Ice Hockey Players: A Cross Sectional Study. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Małgorzata Grabara,Anna Bieniec
The aim of this study was to evaluate functional movement patterns and spinal posture of elite ice hockey players and to examine the association between spinal posture, prevalence of musculoskeletal symptoms and Functional Movement Screen (FMSTM) scores. The study included 86 elite male ice hockey players aged 18 to 38 years. Sagittal spinal curvatures were measured with a Saunders digital inclinometer
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Fast and Medium Tempo Resistance Training with a Low Number of Repetitions in Trained Men: Effects on Maximal Strength and Power Output. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Wei Lu,Zonghao Du,Aiguo Zhou
This study aimed to investigate the effects of high load fast and medium tempo back squats using a low number of repetitions on maximal strength and power output. Seventeen participants completed a countermovement jump test and 1-repetition maximum (1-RM) assessment before and after an eight-week intervention. All participants were randomly divided into a fast tempo (FAS: 1/0/1/0) and a medium tempo
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Dietary Nitrate Ingestion Does Not Improve Neuromuscular Performance in Male Sport Climbers. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Luis A Berlanga,Alvaro Lopez-Samanes,Julio Martin-Lopez,Ruben Martinez de la Cruz,Marta Garces-Rimon,Justin Roberts,Gabriele Bertotti
Beetroot juice (BJ) is commonly used as an ergogenic aid in endurance and team sports, however, the effect of this supplement on climbing performance is barely studied. The purpose of the current study was to investigate the effect of acute BJ ingestion on neuromuscular and biochemical variables in amateur male sport climbers. Ten physically active sport climbers (28.8 ± 3.7 years) underwent a battery
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Conditioning Strategies for Improving Handball Throwing Velocity: A Systematic Review and Meta-Analyses. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Jan Petruzela,Monika Papla,Petr Stastny
Ball throwing velocity is essential for scoring goals in handball; the crucial question is how to develop throwing velocity in highly trained handball players. Therefore, this systematic review aims to summarize effective conditioning strategies to improve throwing velocity in elite male players and to perform a meta-analysis on which training system can provide the highest increase in throwing velocity
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Comparison of Muscle Activity between the Horizontal Bench Press and the Seated Chest Press Exercises Using Several Grips. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 José M Muyor,David Rodríguez-Ridao,José M Oliva-Lozano
This study aims to compare muscle activity in the pectoralis major, anterior deltoid, and triceps brachii in the horizontal bench press exercise with a prone grip at 150% and 50% of the biacromial width and the seated chest press exercise with two types of grips (a neutral grip at ~150% of the biacromial width and a prone grip at ~200% of the biacromial width). Twenty physically active adults performed
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The Relative Age Effect in Ice Hockey: Analysis of Its Presence, Its Fading and of a Reversal Effect among Junior and Professional Leagues. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Jean Lemoyne,François Trudeau,Simon Grondin
This study analyzes the relative age effect (RAE) among the world's best junior hockey leagues and in the NHL. Despite the prevalence of RAE in ice hockey, past research suggests its fading-reversal over time, which may occur at later stages of athletic development. The hypothesis of the RAE reversal was tested with two sources of raw data files from the 2021-2022 season: 15 of the best international
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The Influence of Emotional Intelligence on Coping Ability in Senior Female Field-Hockey Players in South Africa. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Julius Jooste,Ankebé Kruger,Nicola Tinkler
Research has suggested that coping under pressure could be rooted in the ability to identify and manage one's emotions. In this study, we investigated this hypothesis using cross-sectional data obtained from a sample of South African national and university level female field-hockey players (N = 60, Mage = 21.57, SD = 3.65). A correlational research design was adopted of which a pen-and-paper survey
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Influence of Target Width and Distance on Postural Adjustments in a Fencing Lunge. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Anna Akbaş,Wojciech Marszałek,Anna Brachman,Grzegorz Juras
The aim of this study was to examine whether target width and target distance influence the planning phase of a fencing lunge (early and anticipatory postural adjustments) as well as the execution phase of a fencing lunge. Eight elite female fencers participated in the study. The displacement of the center of foot pressure, muscle activity of the tibialis anterior, and kinematics of center of mass
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Enhancement of Muscle Shortening Torque Preloaded with Muscle Lengthening is Joint-Specific. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-04-20 Marzouq K Almutairi,Gary R Hunter,Donald H Lein,SoJung Kim,David R Bryan,Mario Inacio,Christopher P Hurt,William Reed,Harshvardhan Singh
Our cross-sectional study aimed to investigate joint specificity of concentric muscle torque enhancement after a maximum eccentric contraction for the knee versus ankle joints across two different movement velocities (120°/s and 180°/s). After a familiarization session, 22 healthy young adults randomly performed concentric (CONC) and maximum eccentric preloaded concentric (EccCONC) muscle strength
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Posturographic Standards for Optimal Control of Human Standing Posture. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Janusz W Błaszczyk,Monika Beck
Static posturography is a simple non-invasive technique commonly used in contemporary labs and clinics to quantify the central nervous system adaptive mechanisms involved in the control of posture and balance. Its diagnostic value, however, is quite limited due to the lack of posturographic standards for the stable posture. To solve this problem, in this research, we aimed to establish reference values
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The Effects of Intermittent Diet Breaks during 25% Energy Restriction on Body Composition and Resting Metabolic Rate in Resistance-Trained Females: A Randomized Controlled Trial. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Madelin R Siedler,Megan H Lewis,Eric T Trexler,Priscila Lamadrid,Brian J Waddell,Sarah F Bishop,Gillian SanFilippo,Kaitlin Callahan,David Mathas,Gianna F Mastrofini,Menno Henselmans,Fredrik T Vårvik,Bill I Campbell
The purpose of this study was to examine the effects of intermittent versus continuous energy restriction on body composition, resting metabolic rate, and eating behaviors in resistance-trained females. Thirty-eight resistance-trained females (mean ± standard deviation age: 22.3 ± 4.2 years) were randomized to receive either six weeks of a continuous 25% reduction in energy intake (n = 18), or one
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Influence of the Competitive Level and Weight Class on Technical Performance and Physiological and Psychophysiological Responses during Simulated Mixed Martial Arts Fights: A Preliminary Study. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Orlando Folhes,Víctor Machado Reis,Diogo Luís Marques,Henrique Pereira Neiva,Mário Cardoso Marques
This study aimed to analyze the influence of the competitive level and weight class on technical performance and physiological and psychophysiological responses during simulated MMA fights. Twenty MMA male athletes were divided into four groups: heavyweight elite (HWE; n = 6), lightweight elite (LWE; n = 3), heavyweight professional (HWP; n = 4), and lightweight professional (LWP; n = 7). All athletes
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Relationships between Changes in Hematological Adaptations and Exercise Capacity in Olympic Rowers after a Period of Reduced Training Loads. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Dariusz Sitkowski,Andrzej Klusiewicz,Andrzej Pokrywka,Wojciech Jankowski,Jadwiga Malczewska-Lenczowska
Endurance performance is positively associated with hematological adaptations; therefore, high total hemoglobin mass and intravascular volumes are commonly observed in high-level endurance athletes. However, it is still unclear whether the fluctuations in exercise capacity that typically occur in endurance athletes during the annual training cycle are directly associated with changes in hematological
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Squat and Countermovement Vertical Jump Dynamics Using Knee Dominant or Hip Dominant Strategies. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Keitaro Seki,Tomoki Nagano,Kiyohide Aoyama,Yasunori Morioka
This study aimed to investigate squat jump and countermovement jump kinetics in the knee dominant and hip dominant postures. Participants included 12 male sports science students. They were instructed to perform a squat jump and a countermovement jump with two squat postures: knee- and hip-dominant postures. The jumping motion and ground reaction force were recorded using a motion capture system and
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The Effect of Fatigue on Trunk and Pelvic Jump-Landing Biomechanics in View of Lower Extremity Loading: A Systematic Review. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Stefan Vermeulen,Camilla De Bleecker,Cedric De Blaiser,Özge Onursal Kilinç,Tine Willems,Jos Vanrenterghem,Philip Roosen,Roel De Ridder
Fatigue has often been considered a risk factor for developing sports injuries, modulating lower extremity jump-landing biomechanics. The impact of fatigue on proximal trunk and pelvic biomechanics has been suggested to play an important role in lower extremity loading and injury risk, yet the available evidence remains ambiguous as the trunk and pelvis were often not the primary focus of research
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The Effect of Unilateral and Bilateral Leg Press Training on Lower Body Strength and Power and Athletic Performance in Adolescent Rugby Players. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Xiang Zhao,Anthony P Turner,John Sproule,Shaun M Phillips
This study aimed to compare the effects of 5 weeks of unilateral and bilateral leg press training on lower body strength, linear sprinting and vertical jumping performance in adolescent rugby players. Twenty-six male adolescent rugby players (age = 15.3 ± 0.4 years) were assigned via stratified block randomization to unilateral (n = 9), bilateral (n = 9) and control (n = 8) groups. Training consisted
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Concurrent and Angle-Trajectory Validity and Intra-Trial Reliability of a Novel Multi-View Image-Based Motion Analysis System. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Namgi Lee,Junghoon Ahn,Wootaek Lim
Sports-related injuries are the most common in the lower extremities among physical regions. To evaluate impaired functional performance in sports training facilities and sports, a marker-less motion analysis system that can measure joint kinematics in bright indoor and outdoor environments is required. The aim of this study was to establish the concurrent and angle-trajectory validity and intra-trial
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Differences in Velocities of Crucial Body Segments while Executing Roundhouse Kicks for Both Sides. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Jacek Wąsik,Dariusz Mosler,Dorota Ortenburger,Tomasz Góra,Robert Podstawski
Lower limb kinematics of the roundhouse kick is a well-known topic studied by many researchers. However, there is a lack of data about the velocity of the core and upper limbs during the execution of this technique. The aim of this study was to evaluate the differences in velocities of all crucial body segments while executing roundhouse kicks for both sides of the body. Thirteen elite taekwon-do athletes
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Sex Difference in Lower-limb Electromyography and Kinematics when Using Resistance Bands during a Barbell Back Squat. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Shahab Alizadeh,Leah Vardy,Garrick N Forman,Davis A Forman,Michael W R Holmes,Duane C Button
The aim of this study was to compare the muscle activity of the gluteus medius (GMe), gluteus maximus (GMa), biceps femoris (BF), vastus lateralis (VL), vastus medialis (VM) and erector spinae (ES) as well as medial knee displacement (MKD) while using varying stiffness resistance bands (red: 1.68 kg; black: 3.31 kg; gold: 6.44 kg) during a barbell back squat (BBS) among males and females. A total of
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Effects of a Velocity-Based Complex Training Program in Young Female Artistic Roller Skating Athletes. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 André Rebelo,João R Pereira,Diogo V Martinho,João Valente-Dos-Santos
Complex training consists of a near maximal strength effort followed by a biomechanically similar explosive exercise. One of many complex training methods that have been proposed is the French Contrast Method. The aim of this study was to analyze the effects of the French Contrast Method on maximal strength and power of young female artistic roller skating athletes with the help of velocity-based training
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Strength and Conditioning Practices of Brazilian Olympic Sprint and Jump Coaches. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Irineu Loturco,Thomas Haugen,Tomás T Freitas,Chris Bishop,Tulio B M A Moura,Valter P Mercer,Pedro E Alcaraz,Lucas A Pereira,Anthony Weldon
Olympic coaches are likely to have adequate knowledge and implement effective training programs. This study aimed to describe and critically examine the strength and conditioning practices adopted by Brazilian Olympic sprint and jump coaches. Nineteen Olympic coaches (age: 50.2 ± 10.8 years; professional experience: 25.9 ± 13.1 years) completed a survey consisting of eight sections: 1) background information;
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The Impact of Fatigue on the Sense of Local and Global Rhythmic Movement. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Michał Pawłowski,Mariusz P Furmanek,Bogdan Bacik,Tomasz Skowronek
Efficient movement control and the mechanisms responsible for the sense of rhythm are still not fully understood. The purpose of this paper was to estimate the influence of fatigue on the sense of rhythm defined as specific order of movements and their rhythmic perception. It was examined in a holistic way, by analyzing both global and local aspects of the movement. Twenty adult participants (20.2
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Agreement between Different Methods to Measure the Active Drag Coefficient in Front-Crawl Swimming. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Jorge E Morais,Tiago M Barbosa,Nuno D Garrido,Maria S Cirilo-Sousa,António J Silva,Daniel A Marinho
The aim of this study was to analyze the agreement of the active drag coefficient measured through drag and propulsion methods. The sample was composed of 18 swimmers (nine boys: 15.9 ± 0.9 years; nine girls: 15.3 ± 1.2 years) recruited from a national swimming team. The velocity perturbation method was used as the drag measurement system and the Aquanex system as the propulsion system. For both sexes
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Foot Cooling between Interval Bouts Enhances Repeated Lower Limb Power Performance: The Role of Delaying Fatigue. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Chih-Min Wu,Jen-Yu Ho,Wen-Yi Wang,Zong-Yan Cai
This study aimed to investigate whether interbout foot cooling (FC) may enhance repeated lower limb power performance and the corresponding physiological responses based on interset FC, which has been demonstrated to enhance leg-press performance. In a repeated-measures crossover design, ten active men (aged 21.5 ± 1.5 years, exercising >3 times per week) performed four bouts of 10-s cycle ergometer
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Time Management Strategies of Rock Climbers in World Cup Bouldering Finals. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Ben J Mckellar,Alexandra M Coates,Jeremy N Cohen,Jamie F Burr
Competitive rock climbing recently made its Olympic debut, but minimal published research exists regarding training and competition strategies. Time management strategies define the structured approach climbers take in bouldering competitions to successfully obtain a "top" or a "zone" hold. During finals rounds of the International Federation of Sport Climbing bouldering competitions, climbers are
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Physiological Variables that Contribute to Aerobic Fitness in Boys during Early Adolescence in the Context of Basketball Training and the Maturity Level. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Eligijus Mačinskas,Loreta Stasiulė,Kęstutis Pužas,Arvydas Stasiulis
The aim of this study was to assess physiological variables that contribute to aerobic fitness in respect to basketball training and the maturity level in adolescent boys. Our subjects were 28 basketball-trained and 22 control-group boys (average age: 11.83 ± 0.43 years). An incremental treadmill running test to exhaustion was performed twice with a 1-year interval between the sessions to determine
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When and How Do Soccer Players From a Semi-Professional Club Sprint in Match Play? J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 José M Oliva-Lozano,Juan Cuenca-López,Javier Suárez,Paulino Granero-Gil,José M Muyor
The aims of this study were to investigate the periods in which sprints occurred during official matches and analyze these sprints considering the effect of the playing position and different contextual variables. Electronic performance and tracking systems were used for the analysis of all sprints performed by players. Matches were recorded by video and synchronized with performance tracking data
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Reference Values of the Forearm Tremor Power Spectra for Youth Athletes. J. Hum. Kinet. (IF 2.3) Pub Date : 2023-01-20 Jan Gajewski,Joanna Mazur-Różycka,Michał Górski,Krzysztof Buśko
The aim of the study was to determine reference graphs of power spectral density functions of forearm physiological tremor and to compare their parameters in the male and female population of young athletes from various sports. One hundred fifty-nine (159) female (15.7 ± 2.1 years, 59.8 ± 8.1 kg, 169.1 ± 7.5 cm) and 276 male (16.4 ± 1.9 years 72.7 ± 10.3 kg and 180.9 ± 8.7 cm) youth athletes participated