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https://www.readbyqxmd.com/read/27918677/a-comparison-of-isometric-mid-thigh-pull-strength-vertical-jump-sprint-speed-and-change-of-direction-speed-in-academy-netball-players
#1
Christopher Thomas, Paul Comfort, Paul A Jones, Thomas Dos'Santos
PURPOSE: To investigate (a) the relationships between maximal isometric strength, vertical jump (VJ), sprint speed, and change of direction speed (CODS) in academy netball players, and (b) determine whether players who have high performance in isometric strength testing would demonstrate superior performance in VJ, sprint speed, and CODS measures. METHODS: Twenty-six young female netball players (age = 16.1 ± 1.2 years; height = 173.9 ± 5.7 cm; body mass = 66...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918670/combined-plyometric-strength-training-improves-ice-hockey-players-on-ice-sprint
#2
Torstein E Dæhlin, Ole C Haugen, Simen Haugerud, Ivana Hollan, Truls Raastad, Bent R Rønnestad
: Combined plyometric and strength training have previously been suggested as a strategy to improve skating performance in ice hockey players. However, the effects of combined plyometric and strength training has not been previously been compared to the effects of strength training only. PURPOSE: To compare the effects of combined plyometric and strength training on ice hockey players' skating sprint performance with strength training only. METHODS: Eighteen participants were randomly assigned to two groups that completed 5 strength-training sessions per week for 8 weeks...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27895923/concurrent-validity-of-the-gyko-inertial-sensor-system-for-the-assessment-of-vertical-jump-height-in-female-sub-elite-youth-soccer-players
#3
Melanie Lesinski, Thomas Muehlbauer, Urs Granacher
BACKGROUND: The aim of the present study was to verify concurrent validity of the Gyko inertial sensor system for the assessment of vertical jump height. METHODS: Nineteen female sub-elite youth soccer players (mean age: 14.7 ± 0.6 years) performed three trials of countermovement (CMJ) and squat jumps (SJ), respectively. Maximal vertical jump height was simultaneously quantified with the Gyko system, a Kistler force-plate (i.e., gold standard), and another criterion device that is frequently used in the field, the Optojump system...
2016: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27893481/the-effect-of-exercise-induced-muscle-damage-after-a-bout-of-accentuated-eccentric-load-drop-jumps-and-the-repeated-bout-effect
#4
Lee A Bridgeman, Nicholas D Gill, Deborah K Dulson, Michael R McGuigan
Although previous studies have investigated exercise induced muscle damage (EIMD) after a bout of unloaded drop jumps (DJ) none have investigated the effects of accentuated eccentric load (AEL) DJs on EIMD. The purpose of this study was to investigate the effects of 30 and 50 AEL DJs on strength, jump performance, muscle soreness and blood markers. Eight resistance trained athletes participated in this study. In week 1 baseline countermovement jump (CMJ), squat jump (SJ), concentric and eccentric peak force (PF), creatine kinase (CK) and muscle soreness (SOR) were assessed...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27893479/complex-training-the-effect-of-exercise-selection-and-training-status-on-post-activation-potentiation-in-rugby-league-players
#5
David J Scott, Massimiliano Ditroilo, Phil Marshall
This study compared the post-activation potentiation (PAP) response of the hex bar deadlift (HBD) and back squat (BS) exercises. The PAP response between different levels of athletes was also compared. Ten professional and ten amateur rugby league players performed two experimental sessions. Participants performed a countermovement jump (CMJ) before and 2, 4, 6, 8, 10, 12, 14 and 16 minutes after a conditioning activity (CA) that contained 1 set of 3 repetitions at 93% 1RM of either HBD or BS. A force platform determined peak power output (PPO), force at PPO, velocity at PPO and jump height of each CMJ...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27893474/hypertrophy-and-explosive-reactive-functioning-in-sedentary-men-following-10-weeks-of-whole-body-vibration
#6
Jens Ebing, Ulf Gast, Christoph Hauptmann, Dieter Felsenberg, Daniel L Belavý
The objective of this study was to determine the impact of vertical (Power-plate; POW) and side-alternating (Galileo; GAL) whole-body vibration exercise on muscle mass and lower-limb neuromuscular function. Forty-three sedentary male subjects (18-30yr) randomized into three groups underwent two upper-body exercise sessions per week for 10 weeks. Two groups of subjects underwent additional squat exercises on the GAL (N=15) or POW (N=14) devices. The third group was control. On magnetic resonance imaging, volume of the thigh muscles was measured...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27874306/power-and-speed-differences-between-brazilian-paralympic-sprinters-with-visual-impairment-and-their-guides
#7
Lucas Pereira, Ciro Winckler, Cesar C Cal Abad, Ronaldo Kobal, Katia Kitamura, Amaury Veríssimo, Fabio Y Nakamura, Irineu Loturco
This study compared the physical performance of Paralympic sprinters with visual impairments (PSVI) and their guides in jump and sprint tests. Ten PSVI and guides executed squat jumps (SJ), countermovement jumps (CMJ), horizontal quintuple right/left-leg jumps (QR/QL), decuple jumps (DEC), and 50-m-sprint tests. The guides were superior to the PSVI in SJ (35.9 ± 6.3 vs 45.6 ± 3.2 cm), CMJ (38.5 ± 6.2 vs 46.7 ± 4.0 cm), QR (9.2 ± 1.9 vs 12.7 ± 1.0 m), QL (9.4 ± 1.9 vs 13.1 ± 0.8 m), DEC (21.0 ± 3.3 vs...
October 2016: Adapted Physical Activity Quarterly: APAQ
https://www.readbyqxmd.com/read/27870698/risk-factors-for-injury-among-japanese-collegiate-players-of-american-football-based-on-performance-test-results
#8
Junta Iguchi, Yuya Watanabe, Misaka Kimura, Yoshihiko Fujisawa, Tatsuya Hojo, Yasuhiro Yuasa, Shinsuke Higashi, Kenji Kuzuhara
Iguchi, J, Watanabe, Y, Kimura, M, Fujisawa, Y, Hojo, T, Yuasa, Y, Higashi, S, and Kuzuhara, K. Risk factors for injury among Japanese collegiate players of American football based on performance test results. J Strength Cond Res 30(12): 3405-3411, 2016-The purpose of this study was to identify how risk factors for injury during American football are related to players' physical strength as determined using typical performance tests. One hundred 53 Japanese collegiate players of American football were recruited for this study...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27857693/heavy-resistance-training-in-hypoxia-enhances-1rm-squat-performance
#9
Mathew W H Inness, François Billaut, Emily J Walker, Aaron C Petersen, Alice J Sweeting, Robert J Aughey
Purpose: To determine if heavy resistance training in hypoxia (IHRT) is more effective at improving strength, power, and increasing lean mass than the same training in normoxia. Methods: A pair-matched, placebo-controlled study design included 20 resistance-trained participants assigned to IHRT (FIO2 0.143) or placebo (FIO2 0.20), (n = 10 per group). Participants were matched for strength and training. Both groups performed 20 sessions over 7 weeks either with IHRT or placebo. All participants were tested for 1RM, 20-m sprint, body composition, and countermovement jump pre-, mid-, and post-training and compared via magnitude-based inferences...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27849114/effects-of-in-season-short-term-aerobic-and-high-intensity-interval-training-program-on-repeated-sprint-ability-and-jump-performance-in-handball-players
#10
Souhail Hermassi, Jørgen Ingebrigtsen, René Schwesig, Georg Fieseler, Karl S Delank, Karim Chamari, Roy J Shephard, Mohamed S Chelly
BACKGROUND: This study examined the effects of a 7-week in-season aerobic and high-intensity interval-training program on performance tests linked to successful handball play (e.g., repeated sprint and jumping ability). METHODS: Thirty participants (age 17.0 ± 1.2 years, body mass 81.1 ± 3.4 kg, height 1.82± 0.07 m) performed a Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), a squat (SJ) and a countermovement jump test (CMJ), as well as a repeated sprint ability test (RSA)...
November 16, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27844453/explosive-movement-in-the-older-men-analysis-and-comparative-study-of-vertical-jump
#11
Sébastien Argaud, Benoit Pairot de Fontenay, Yoann Blache, Karine Monteil
BACKGROUND: Loss of power has been demonstrated to have severe functional consequences to perform physical daily living tasks in old age. PURPOSE: This study aimed to assess how moment and velocity were affected for each joint of the lower limbs during squat jumping for older men in comparison with young adults. METHODS: Twenty-one healthy older men (74.5 ± 4.6 years) and 22 young men (21.8 ± 2.8 years) performed maximal squat jumps...
November 14, 2016: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/27820725/training-strategies-to-improve-muscle-power-is-olympic-style-weightlifting-relevant
#12
Christian Helland, Eirik Hole, Erik Iversen, Monica Charlotte Olsson, Olivier Seynnes, Paul Andre Solberg, Gøran Paulsen
INTRODUCTION: This efficacy study investigated the effects of (1) Olympic-style weightlifting (OWL), (2) motorized strength and power training (MSPT), and (3) free weight strength and power training (FSPT) on muscle power. METHODS: Thirty-nine young athletes (20±3 yr.; ice hockey, volleyball and badminton) were randomized into the three training groups. All groups participated in 2-3 sessions/week for 8 weeks. The MSPT and FSPT groups trained using squats (two legs and single leg) with high force and high power, while the OWL group trained using clean and snatch exercises...
November 3, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27813392/physical-and-physiological-differences-of-backs-and-forwards-from-the-brazilian-national-rugby-union-team
#13
Fábio Y Nakamura, Lucas A Pereira, José E Moraes, Ronaldo Kobal, Katia Kitamura, Cesar C Cal Abad, Luís M Teixeira Vaz, Irineu Loturco
BACKGROUND: The aim of this study was to compare backs and forwards rugby union players recruited to a National team in the following physical and physiological indicators: anthropometrics, squat jump (SJ), countermovement jump (CMJ), 10- and 30-m sprint, resting heart rate variability (HRV), Yo-Yo test and heart rate (HR) at 2-min of test. METHODS: The measurements were performed on the first day of a training camp planned to finely select the players who would participate in the 2016 America's Rugby Championship...
November 4, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27806013/the-effect-of-high-speed-strength-training-on-physical-performance-in-young-soccer-players-of-different-ages
#14
David Rodriguez-Rosell, Felipe Franco-Márquez, Ricardo Mora-Custodio, Juan José González-Badillo
The aim of the present study was to compare the effectiveness of low-load, low-volume weight training combined with plyometrics on strength, sprint and jump performance in soccer players of different ages. Eighty-six soccer players from the same academy were categorized into 3 groups by age (under 13 year, U13, n = 30; under 15, U15, n = 28; under 17, U17, n = 28) and then randomly assigned into two subgroups: a strength training group (STG) and a control group (CG). The strength training program was performed twice a week for 6 weeks and consisted of full squats (load: 45-60% 1RM; volume: 3 set of 8-4 repetitions), jumps and straight line sprint exercises...
October 28, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27806012/acute-effects-of-plyometric-and-resistance-training-on-running-economy-in-trained-runners
#15
Richard T Marcello, Beau Kjerulf Greer, Anna E Greer
Results regarding the acute effects of plyometric and resistance training (PRT) on running economy (RE) are conflicting. Eight male collegiate distance runners (21 ± 1 years, 62.5 ± 7.8 ml/kg/min V[Combining Dot Above]O2 peak) completed V[Combining Dot Above]O2 peak and 1 repetition maximum (1RM) testing. Seven days later, subjects completed a 12 minute RE test at 60% and 80% V[Combining Dot Above]O2 peak, followed by a PRT protocol or a rested condition of equal duration (CON). The PRT protocol consisted of 3 sets of 5 repetitions at 85% 1RM for barbell squats, Romanian deadlifts, and barbell lunges; the same volume was utilized for resisted lateral lunges, box jumps, and depth jumps...
October 28, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27806006/using-the-split-squat-to-potentiate-bilateral-and-unilateral-jump-performance
#16
Chris Bishop, Joe Tarrant, Paul Jarvis, Anthony Turner
The purpose of this study was to examine if a split squat conditioning exercise with no or light loads could potentiate unilateral and bilateral jump performance. Twelve semi-professional rugby players (age: 22.3 ± 1.4 years; height: 1.84 ± 0.05 m, mass: 92.4 ± 9.6 kg) from the English National League 1 performed a series of unilateral and bilateral countermovement jumps (CMJ) and broad jumps (BJ) over the course of two testing days. Both testing days involved performing baseline jumps before completing two sets of ten repetitions of a split squat, this completed with either bodyweight (testing session 1) or a 30kg weighted vest (testing session 2)...
October 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27803628/improved-maximum-strength-vertical-jump-and-sprint-performance-after-8-weeks-of-jump-squat-training-with-individualized-loads
#17
Vanderka Marián, Longová Katarína, Olasz Dávid, Krčmár Matúš, Walker Simon
The purpose of the study was to determine the effects of 8 weeks of jump squat training on isometric half squat maximal force production (Fmax) and rate of force development over 100ms (RFD100), countermovement jump (CMJ) and squat jump (SJ) height, and 50 m sprint time in moderately trained men. Sixty eight subjects (~21 years, ~180 cm, ~75 kg) were divided into experimental (EXP; n = 36) and control (CON, n = 32) groups. Tests were completed pre-, mid- and post-training. EXP performed jump squat training 3 times per week using loads that allowed all repetitions to be performed with ≥90% of maximum average power output (13 sessions with 4 sets of 8 repetitions and 13 sessions with 8 sets of 4 repetitions)...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27803627/muscle-contraction-velocity-a-suitable-approach-to-analyze-the-functional-adaptations-in-elite-soccer-players
#18
Irineu Loturco, Lucas A Pereira, Ronaldo Kobal, Katia Kitamura, Rodrigo Ramírez-Campillo, Vinicius Zanetti, Cesar C Cal Abad, Fabio Y Nakamura
Tensiomyography (TMG) has been used as a simple and non-invasive tool to assess the mechanical properties of skeletal muscles. The TMG-derived velocity of contraction (Vc), which can be calculated from the ratio between maximal radial displacement and the sum of contraction time and delay time, has been proposed for evaluating athletes. However, its sensitivity to training effects and possible relation with changes in soccer players' neuromuscular performance have not yet been addressed. To test this possibility, twenty-two male Brazilian elite soccer players were assessed using TMG-derived Vc, unloaded squat jump, countermovement jump and drop jump at 45 cm, loaded jump squat and linear (20 m) and change of direction (COD) sprint tests, prior to and after an 8-week period, between two consecutive official tournaments, during which the concurrency between endurance and strength-power training commonly impairs neuromuscular capacities...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27789212/multi-modal-exercise-training-and-protein-pacing-enhances-physical-performance-adaptations-independent-of-growth-hormone-and-bdnf-but-may-be-dependent-on-igf-1-in-exercise-trained-men
#19
Stephen J Ives, Chelsea Norton, Vincent Miller, Olivia Minicucci, Jake Robinson, Gabe O'Brien, Daniela Escudero, Maia Paul, Caitlin Sheridan, Kathryn Curran, Kayla Rose, Nathaniel Robinson, Feng He, Paul J Arciero
OBJECTIVE: Protein-pacing (P; 5-6meals/day @ 2.0g/kgBW/day) and multi-mode exercise (RISE; resistance, interval, stretching, endurance) training (PRISE) improves muscular endurance, strength, power and arterial health in exercise-trained women. The current study extends these findings by examining PRISE on fitness, growth hormone (GH), insulin-like growth factor-1 (IGF-1), and brain-derived neurotrophic factor (BDNF) response, cardiometabolic health, and body composition in exercise-trained men...
October 15, 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/27787464/the-effects-of-eccentric-contraction-duration-on-muscle-strength-power-production-vertical-jump-and-soreness
#20
Jonathan Mike, Nathan Cole, Chris Herrera, Trisha McLain, Len Kravitz, Chad Kerksick
Prior research has investigated the effects of either eccentric-only training or comparing eccentric and concentric exercise on changes related to strength and power expression, but no research to date has investigated the impact of altering the duration of either the concentric or eccentric component on these parameters. Therefore, the purpose of this study was to assess the duration of eccentric (i.e. 2-second, 4-second vs. 6-second) muscle contractions and their effect on muscle strength, power production, vertical jump and soreness using a plate-loaded barbell Smith squat exercise...
October 20, 2016: Journal of Strength and Conditioning Research
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