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https://www.readbyqxmd.com/read/28338423/assessment-of-leg-muscles-mechanical-capacities-which-jump-loading-and-variable-type-provide-the-most-reliable-outcomes
#1
Amador García-Ramos, Belén Feriche, Alejandro Pérez-Castilla, Paulino Padial, Slobodan Jaric
This study aimed to explore the strength of the force-velocity (F-V) relationship of lower limb muscles and the reliability of its parameters (maximum force [F0], slope [a], maximum velocity [V0], and maximum power [P0]). Twenty-three men were tested in two different jump types (squat and countermovement jump: SJ and CMJ), performed under two different loading conditions (free weight and Smith machine: Free and Smith) with 0, 17, 30, 45, 60, and 75 kg loads. The maximum and averaged values of F and V were obtained for the F-V relationship modelling...
March 24, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28328713/the-effect-of-standard-strength-vs-contrast-strength-training-on-the-development-of-sprint-agility-repeated-change-of-direction-and-jump-in-junior-male-soccer-players
#2
Mehréz Hammami, Yassine Negra, Roy J Shephard, Mohamed Souhaiel Chelly
Hammami, M, Negra, Y, Shephard, RJ, and Chelly, MS. The effect of standard strength vs. contrast strength training on the development of sprint, agility, repeated change of direction, and jump in junior male soccer players. J Strength Cond Res 31(4): 901-912, 2017-The aim was to compare the impact of 2 differing strength training (ST) programs on the athletic performance of junior male soccer players at a critical phase during their competitive season. Participants aged 16.0 ± 0.5 years were randomly assigned between control (C, n = 12), standard ST (n = 16), and contrast strength training (CST, n = 16), each performed twice a week...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28315285/effects-of-plyometric-training-on-physical-fitness-in-prepuberal-soccer-athletes
#3
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Mohamed Aymen Abbes, Younés Hachana, Urs Granacher
This study aimed at examining the effects of plyometric training on stable (SPT) vs. unstable (UPT) surfaces on physical fitness in prepuberal soccer players. Male athletes were randomly assigned to SPT (n=18; age=12.7±0.2 years) or UPT (n=16; age=12.2±0.5 years). Both groups conducted 3 regular soccer training sessions per week combined with either 2 SPT or UPT sessions. Assessment of jumping ability (countermovement jump [CMJ], and standing long jump [SLJ]), speed (10-m, 20-m, 30-m sprint), agility (Illinois agility test [IAT]), and balance (stable [SSBT], unstable [USBT] stork balance test; stable [SYBT], unstable [UYBT] Y balance test) was conducted pre-and post-training...
March 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28301441/predictors-of-linear-and-multidirectional-acceleration-in-elite-soccer-players
#4
Northeast Jonathan, M Russell, D Shearer, C Cook, L Kilduff
Linear and multidirectional acceleration underpins success in professional soccer match-play. However, the physical qualities that determine these performance indicators are poorly understood in elite players. English Premier League players (n=26) performed isometric mid-thigh pulls (IMTP), bilateral and unilateral drop jumps (DJ; from 40 and 20 cm, respectively), bilateral and unilateral countermovement jumps (CMJ) and assessments of linear (5-, 10-, 20-m) and multidirectional (left/right pre-planned and reactive) acceleration...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28288203/the-effects-of-menstrual-cycle-phase-on-physical-performance-in-female-soccer-players
#5
Ross Julian, Anne Hecksteden, Hugh H K Fullagar, Tim Meyer
BACKGROUND: Female soccer has grown extensively in recent years, however differences in gender-specific physiology have rarely been considered. The female reproductive hormones which rise and fall throughout the menstrual cycle, are known to affect numerous cardiovascular, respiratory, thermoregulatory and metabolic parameters, which in turn, may have implications on exercise physiology and soccer performance. Therefore, the main aim of the present study was to investigate potential effects of menstrual cycle phase on performance in soccer specific tests...
2017: PloS One
https://www.readbyqxmd.com/read/28277422/neuromuscular-adaptations-to-short-term-high-intensity-interval-training-in-female-ice-hockey-players
#6
Juho-Ville Kinnunen, Harri Piitulainen, Jarmo M Piirainen
High-intensity interval training (HIIT) related neuromuscular adaptations, changes in force production and on-ice performance were investigated in female ice-hockey players during pre-season. Fourteen Finnish championship level ice hockey players (average age 22 ± 3 years) participated in 2½-week HIIT. Both spinal (H-reflex) and supraspinal (V-wave) neuromuscular responses of the soleus muscle were recorded before and after the training period. Static jump (SJ) and countermovement jump (CMJ) heights, plantar flexor maximal voluntary contraction (MVC) and rate of force development (RFD) were measured...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28231435/impact-of-a-competition-with-two-consecutive-matches-in-a-day-on-physical-performance-in-young-tennis-players
#7
Cesar Gallo-Salazar, Juan Del Coso, David Barbado, Alejandro Lopez-Valenciano, Francisco Javier Santos-Rosa, David Sanz-Rivas, Manuel Moya, Jaime Fernandez-Fernandez
The purpose of this study was to analyze the effects of playing two tennis matches on the same day on physical performance in young tennis players. Twelve well-trained young tennis players took part in a simulated tennis competition consisting of two tennis matches on the same day (morning and afternoon sessions). Before and the day after the competition, physical performance was measured using a battery of countermovement jumps (CMJ), a 10-m sprint, the 5-0-5 agility test, hip, grip and shoulder maximal isometric strength, shoulder range of motion (ROM) and a serve velocity test...
February 23, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28229567/repeated-sprint-training-in-the-fasted-state-during-ramadan-morning-or-evening-training
#8
Asma Aloui, Tarak Driss, Hana Baklouti, Hamdi Jaafar, Omar Hammouda, Karim Chamari, Nizar Souissi
BACKGROUND: The present study assessed the optimal moment-of-day for repeated-sprint training in the fasted state during Ramadan. METHODS: Thirty amateur soccer players were randomly assigned to a morning training group (MTG, training at ~08:00 a.m., n = 10), an evening training group (ETG, training at ~06:00 p.m., n = 10), and a control group (n = 10). Training sessions, conducted on alternate days, consisted of 3 sets of 6 × 40-m shuttle sprints (2 × 20 m with 180° direction changes)...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28195972/individual-and-combined-influence-of-ace-and-actn3-genes-on-muscle-phenotypes-in-polish-athletes
#9
Joanna Orysiak, Joanna Mazur-Różycka, Krzysztof Busko, Jan Gajewski, Beata Szczepanska, Jadwiga Malczewska-Lenczowska
The aim of this study was to examine the association between ACE and ACTN3 genes, independently or in combination, and muscle strength and power in male and female athletes. The study involved 398 young male (n=266) and female (n=132) athletes representing various sport disciplines (ice hockey, canoeing, swimming, volleyball). All were Caucasians. The following measurements were taken: height of jump and mechanical power in countermovement jump (CMJ) and spike jump (SPJ), and muscle strength of 10 muscle groups (flexors and extensors of the elbow, shoulder, hip, knee and trunk)...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#10
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28182510/the-effect-of-plyometric-training-volume-in-prepubertal-male-soccer-players-athletic-performance
#11
Helmi Chaabene, Yassine Negra
PURPOSE: The aim of this study was to assess and to compare the effects of 8-weeks in-season (2 sessions per-week) low and high-volume plyometric training (PT) on measures of physical fitness in prepubertal male soccer players. METHODS: A total of twenty-five soccer players were randomly assigned to low-volume plyometric training group (LPT; n=13; age = 12.68 ± 0.23 years; age at peak height velocity (APHV) = 14.25 ± 0.29 years, maturity-offset = -1.57 ± 0.29 years) and high-volume plyometric training group (HPT; n=12; age = 12...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28177751/evidence-of-nonlocal-muscle-fatigue-in-male-youth
#12
Aymen Ben Othman, Anis Chaouachi, Raouf Hammami, Mehdi M Chaouachi, Sofien Kasmi, David G Behm
Evidence for nonlocal muscle fatigue (NLMF) has been inconsistent in adults, with no studies investigating youth. The objective was to examine NLMF in youth. Forty-two young males (age, 10-13 years) were tested for maximal voluntary isometric contraction (MVIC) force of the ipsilateral and contralateral knee extensors at 90° and 120° knee flexion, elbow flexors at 90°, handgrip, knee extensor isokinetic torque (300°·s(-1) analyzed at 90° and 120° knee flexion), as well as a unilateral countermovement jump (CMJ) and Y Balance test (YBT)...
March 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28169153/effects-of-light-load-maximal-lifting-velocity-weight-training-vs-combined-weight-training-and-plyometrics-on-sprint-vertical-jump-and-strength-performance-in-adult-soccer-players
#13
David Rodríguez-Rosell, Julio Torres-Torrelo, Felipe Franco-Márquez, José Manuel González-Suárez, Juan José González-Badillo
OBJECTIVES: The purpose of this study was to compare the effects of combined light-load maximal lifting velocity weight training (WT) and plyometric training (PT) with WT alone on strength, jump and sprint performance in semiprofessional soccer players. DESIGN: Experimental, pre-post tests measures. METHODS: Thirty adult soccer players were randomly assigned into three groups: WT alone (FSG, n=10), WT combined to jump and sprint exercises (COM, n=10) and control group (CG, n=10)...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28152673/effects-of-adding-a-weekly-eccentric-overload-training-session-on-strength-and-athletic-performance-in-team-handball-players
#14
Rafael Sabido, Jose Luis HernáNdez-Davó, Javier Botella, Angel Navarro, Julio Tous-Fajardo
To investigate the influence of adding a weekly eccentric-overload training (EOT) session in several athletic performance's tests, 18 team-handball players were assigned either to an EOT (n = 11) or a Control (n = 7) group. Both groups continued to perform the same habitual strength training, but the EOT group added one session/week during a 7-week training programme consisting of four sets of eight repetitions for the bilateral half-squat and unilateral lunge exercises. The test battery included handball throwing velocity, maximum dynamic strength (1RM), countermovement jump (CMJ), 20 m sprint, triple hop for distance, and eccentric/concentric power in both the half-squat and lunge exercises...
February 2, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28149419/role-of-vertical-jumps-and-anthropometric-variables-in-maximal-kicking-ball-velocities-in-elite-soccer-players
#15
Lois Rodríguez-Lorenzo, Miguel Fernandez-Del-Olmo, José Andrés Sanchez-Molina, Rafael Martín-Acero
Kicking is one of the most important skills in soccer and the ability to achieve ma ximal kicking velocity with both legs leads to an advantage for the soccer player. This study examined the relationship be tween kicking ball velocity with both legs using anthropometric measurements and vertical jumps (a squat jump (SJ); a countermovement jump without (CMJ) and with the arm swing (CMJA) and a reactive jump (RJ)). Anthropome tric measurements did not correlate with kicking ball velocity. Vertical jumps correlated significantly with kicking ball velocity using the dominant leg only (r = ...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149376/a-new-physical-performance-classification-system-for-elite-handball-players-cluster-analysis
#16
Iker J Bautista, Ignacio J Chirosa, Joseph E Robinson, Roland van der Tillaar, Luis J Chirosa, Isidoro Martínez Martín
The aim of the present study was to identify different cluster groups of handball players according to their physical performance level assessed in a series of physical assessments, which could then be used to design a training program based on individual strengths and weaknesses, and to determine which of these variables best identified elite performance in a group of under-19 [U19] national level handball players. Players of the U19 National Handball team (n=16) performed a set of tests to determine: 10 m (ST10) and 20 m (ST20) sprint time, ball release velocity (BRv), countermovement jump (CMJ) height and squat jump (SJ) height...
June 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149354/investigating-the-effects-of-typical-rowing-strength-training-practices-on-strength-and-power-development-and-2-000-m-rowing-performance
#17
Thomas Ian Gee, Nicholas Caplan, Karl Christian Gibbon, Glyn Howatson, Kevin Grant Thompson
This study aimed to determine the effects of a short-term, strength training intervention, typically undertaken by club-standard rowers, on 2,000 m rowing performance and strength and power development. Twenty-eight male rowers were randomly assigned to intervention or control groups. All participants performed baseline testing involving assessments of muscle soreness, creatine kinase activity (CK), maximal voluntary contraction (leg-extensors) (MVC), static-squat jumps (SSJ), counter-movement jumps (CMJ), maximal rowing power strokes (PS) and a 2,000 m rowing ergometer time-trial (2,000 m) with accompanying respiratory-exchange and electromyography (EMG) analysis...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149353/the-relationship-between-the-lower-body-muscular-profile-and-swimming-start-performance
#18
Amador García-Ramos, Katja Tomazin, Belén Feriche, Vojko Strojnik, Blanca de la Fuente, Javier Argüelles-Cienfuegos, Boro Strumbelj, Igor Štirn
This study aimed to examine the correlation of different dry land strength and power tests with swimming start performance. Twenty international level female swimmers (age 15.3 ± 1.6 years, FINA point score 709.6 ± 71.1) performed the track freestyle start. Additionally, dry land tests were conducted: a) squat (SJ) and countermovement jumps (CMJ), b) squat jumps with additional resistance equivalent to 25, 50, 75 and 100% of swimmers' body weight [BW]), and c) leg extension and leg flexion maximal voluntary isometric contractions...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28146030/strength-and-conditioning-practices-in-adolescent-rugby-players-relationship-with-changes-in-physical-qualities
#19
Jonathon J S Weakley, Kevin Till, Joshua Darrall-Jones, Gregory A B Roe, Padraic J Phibbs, Dale Read, Ben L Jones
Adolescent rugby players benefit from the implementation of resistance training. However resistance training practices and how they influence short-term physical change is unknown. Therefore the purpose of this study was to quantify resistance training practices, evaluate physical development, and relate these changes to resistance training variables across 12-weeks in adolescent rugby union players. Thirty-five male adolescent rugby union players participated in the study with subjects completing an anthropometric and physical testing battery pre- and post- a 12-week in-season mesocycle...
January 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28118307/neuromuscular-and-cardiovascular-adaptations-in-response-to-high-intensity-interval-power-training
#20
Salvador Romero-Arenas, Rubén Ruiz, Antonio Vera, David Colomer-Poveda, Amelia Guadalupe Grau, Gonzalo Márquez
The aim of the present study was to determine the efficacy of a high-intensity power training (HIPT) program, and to compare the effects of HIPT to traditional power training (TPT) on the aerobic and power performance. For this purpose, 29 healthy men (23.1±2.7 years) were recruited and randomly distributed into three different groups. One group performed traditional power training (TPT n=10), the second group performed power training organized as a circuit (HIPT; n=10) and the third group served as control (CG; n=9)...
January 11, 2017: Journal of Strength and Conditioning Research
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