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https://www.readbyqxmd.com/read/29228409/short-term-effects-of-combined-high-intensity-strength-and-sprint-interval-training-on-anthropometric-characteristics-and-physical-performance-of-elite-team-handball-players
#1
Souhail Hermassi, Mohamed Souhail Chelly, Georg Fieseler, Thomas Bartels, Stephan Schulze, Karl-Stefan Delank, Roy J Shepard, René Schwesig
Muscular strength and speed are critical physical factors in determining the technical and tactical skills of elite team handball players. This study thus investigated the effect of high-intensity muscular strength and sprint interval training (SIT) on lower limb explosive performance and anthropometric characteristics in 22 male handball athletes aged 20.2 ± 0.1 years. A training group (TG, n = 12) and a control group (CG, n = 10) were followed over 8 weeks parallel to regular handball training...
December 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29227735/effect-of-8-weeks-of-concurrent-plyometric-and-running-training-on-spatiotemporal-and-physiological-variables-of-novice-runners
#2
Josué Gómez-Molina, Ana Ogueta-Alday, Jesus Camara, Christopher Stickley, Juan García-López
Concurrent plyometric and running training has the potential to improve running economy (RE) and performance through increasing muscle strength and power, but the possible effect on spatiotemporal parameters of running has not been studied yet. The aim of this study was to compare the effect of 8 weeks of concurrent plyometric and running training on spatiotemporal parameters and physiological variables of novice runners. Twenty-five male participants were randomly assigned into two training groups; running group (RG) (n = 11) and running + plyometric group (RPG) (n = 14)...
December 11, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29200094/characteristics-of-a-national-level-female-weightlifter-peaking-for-competition-a-case-study
#3
Caleb D Bazyler, Satoshi Mizuguchi, Michael C Zourdos, Kimitake Sato, Ashley A Kavanaugh, Brad H DeWeese, Kevin F Breuel, Michael H Stone
This study investigated physiological and performance changes of a national level 69kg female weightlifter following three competition phases over a 28-week training period. The athlete first trained for a regional championship (weeks 1-12), followed by a local competition (weeks 13-23) and the national championship (weeks 24-28). Body mass, vastus lateralis cross-sectional area, and unloaded and loaded squat jump performance were assessed weekly during each 4-week competition phase. Serum biomarkers, and dynamic mid-thigh pulls were assessed prior to and after each competition phase...
December 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29199782/anthropometric-and-physiological-characteristics-of-male-soccer-players-according-to-their-competitive-level-playing-position-and-age-group-a-systematic-review
#4
Maamer Slimani, Pantelis T Nikolaidis
BACKGROUND: The aim of the present systematic review was to profile soccer players' anthropometric, physiological, and physical attributes relative to different competitive levels, playing positions and age groups. METHODS: The systematic search was conducted using different databases and according to the Population/Intervention or Exposure/Comparison/Outcome(s) [PICO] criteria. RESULTS: The present review shows that the somatotype characteristics, percentage (%) of body fat, maximal oxygen uptake (VO2max), repeatedsprint ability (RSA), running speed, strength, and muscular power of the lower limbs were the most powerful discriminators between male soccer players of different competitive levels, playing positions, and age groups...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29199778/influence-of-ethnicity-on-vertical-jump-performances-in-male-physical-education-students-a-pilot-study
#5
Elvis Attiogbe, Henry Vandewalle, Tarak Driss
BACKGROUND: The present study aimed to: i) test the possibility of ethnic differences in squat jump (SJ), countermovement jump (CMJ) and countermovement jump with arms swing (CMJA); ii) test the possibility of ethnic differences in the effects of countermovement and arms swing; iii) verify whether the relationships between the different vertical jumps VJ (SJ, CMJ, CMJA) and maximal power (Pmax), determined from a force-velocity test (F-V), were dependent on the ethnicity as previously found for CMJA...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29182414/cfdna-as-an-earlier-predictor-of-exercise-induced-performance-decrement-related-to-muscle-damage
#6
Michely V Andreatta, Victor M Curty, João Victor S Coutinho, Miguel Ângelo A Santos, Paula F Vassallo, Nuno F de Sousa, Valério G Barauna
PURPOSE: The aims of this study were: a) to evaluate whether cell-free DNA (cfDNA) levels increase immediately after an acute light and heavy resistance exercise (RE) bout, and b) to whether cfDNA levels are associated with functional muscle capacity until 48hrs after exercise session. METHODS: Twenty healthy volunteers performed 3 sets of the leg press resistance exercise with 80% of 1RM (RE80) or 40% of 1RM (RE40) with similar exercise volume. Blood lactate was measured after completion of the 3 sets...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29176388/the-effect-of-citrulline-malate-supplementation-on-muscle-fatigue-among-healthy-participants
#7
Tyler M Farney, Matthew V Bliss, Christopher M Hearon, Dassy A Salazar
The focus of the investigation was to examine the effects of citrulline malate on muscular fatigue in healthy, recreationally trained participants. Twelve participants (males = 6; females = 6) (24.1 ± 3.9 yrs) visited the lab on three separate days all separated by one week. Each visit consisted of consuming one of three treatments: placebo (PLA), citrulline malate (8 g) (CM), and control (CON) in which no drink mixture was consumed. For each day of testing, participants consumed assigned treatment and performed one high-intensity exercise trial consisting of squats, lunge jumps, squat jumps, and lateral jumps...
November 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29170708/repeated-plyometric-exercise-attenuates-blood-glucose-in-healthy-adults
#8
Saldiam R Barillas, Casey M Watkins, Megan A Wong, Ian J Dobbs, David C Archer, Cameron N Munger, Andrew J Galpin, Jared W Coburn, Lee E Brown
Plyometric exercise is popular in commercial exercise programs aiming to maximize energy expenditure for weight loss. However, the effect of plyometric exercise on blood glucose is unknown. The purpose of this study was to investigate the effect of relatively high intensity plyometric exercise on blood glucose. Thirteen subjects (6 females age= 21.8 ± 1.0 yrs.; height= 163.7 ± 7.8 cm; mass= 60.8 ± 6.7 kg and 7 males age= 22.0 ± 2.6 yrs.; height= 182.3 ± 3.6 cm; mass= 87.4 ± 12.5 kg) volunteered to participate...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29166930/a-prospective-cohort-study-identifying-risk-factors-for-shoulder-injuries-in-adolescent-elite-handball-players-the-karolinska-handball-study-khast-study-protocol
#9
Martin Asker, Markus Waldén, Henrik Källberg, Lena W Holm, Eva Skillgate
BACKGROUND: Handball is a physical contact sport that includes frequent overhead throwing, and this combination leads to a high rate of shoulder injuries. Several factors have been associated with shoulder injuries in overhead athletes, but strong scientific evidence is lacking for most suggested risk factors. We therefore designed the Karolinska Handball Study (KHAST) with the aim to identify risk factors for shoulder injuries in adolescent male and female elite handball players studying at handball-profiled secondary schools in Sweden...
November 22, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29166832/conditioning-exercises-in-ski-jumping-biomechanical-relationship-of-squat-jumps-imitation-jumps-and-hill-jumps
#10
Silvio Lorenzetti, Fabian Ammann, Sabrina Windmüller, Ramona Häberle, Sören Müller, Micah Gross, Michael Plüss, Stefan Plüss, Berni Schödler, Klaus Hübner
As hill jumps are very time-consuming, ski jumping athletes often perform various imitation jumps during training. The performed jumps should be similar to hill jumps, but a direct comparison of the kinetic and kinematic parameters has not been performed yet. Therefore, this study aimed to correlate 11 common parameters during hill jumps (Oberstdorf Germany), squat jumps (wearing indoor shoes), and various imitation jumps (rolling 4°, rolling flat, static; jumping equipment or indoor shoes) on a custom-built instrumented vehicle with a catch by the coach...
November 22, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29158621/loaded-and-unloaded-jump-performance-of-top-level-volleyball-players-from-different-age-categories
#11
Katia Kitamura, Lucas Adriano Pereira, Ronaldo Kobal, Cesar Cavinato Cal Abad, Ronaldo Finotti, Fábio Yuzo Nakamura, Irineu Loturco
The aim of this study was to investigate the differences in loaded and unloaded jump performances between different age categories of top-level volleyball players from the same club. Forty-three volleyball players were divided into four age groups: under-17, under-19, under-21 and professional. Vertical jumping height for squat jump (SJ), countermovement jump (CMJ) and CMJ with arm swing (CMJa) and mean propulsive velocity (MPV) in the loaded jump squat exercise with 40% of the athlete's body mass were compared among the different age categories, considering body mass as a covariate...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29120989/validity-and-reliability-of-a-new-test-of-planned-agility-in-elite-taekwondo-athletes
#12
Helmi Chaabene, Yassine Negra, Laura Capranica, Raja Bouguezzi, Younés Hachana, Mohamed Ali Rouahi, Bessem Mkaouer
This study aimed to examine the validity, reliability, and sensitivity of a new test of planned agility in elite taekwondo athletes and to establish its relationship with sprint-time, jumping ability, and dynamic balance. Twenty-seven (20 males and 7 females) taekwondo athletes participated to this study. They performed taekwondo-specific agility test (TSAT) in two occasions (i.e., test-retest). Additionally, they performed jumping ability (i.e., squat jump, countermovement jump, standing long jump, and three-hop jump), sprint-time (5-m and 20-m dash), and dynamic balance (i...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29112056/effects-of-a-resistance-training-intervention-on-strength-power-and-performance-in-adolescent-dancers
#13
Rebecca A Dowse, Mike R McGuigan, Craig Harrison
Dowse, RA, McGuigan, MR, and Harrison, C. Effects of a resistance training intervention on strength, power, and performance in adolescent dancers. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to determine whether a 9-week resistance training program could have a significant effect on maximum lower-body strength and power, dynamic balance, and dance performance in adolescent dancers. Twelve competitive adolescent female dancers trained in jazz, ballet, and contemporary were recruited from local dance schools and assigned to a resistance training group (dance experience 9...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29089109/explosive-lower-limb-extension-mechanics-an-on-land-vs-in-water-exploratory-comparison
#14
Brice Guignard, Jessy Lauer, Pierre Samozino, Luis Mourão, João Paulo Vilas-Boas, Annie Hélène Rouard
During a horizontal underwater push-off, performance is strongly limited by the presence of water, inducing resistances due to its dense and viscous nature. At the same time, aquatic environments offer a support to the swimmer with the hydrostatic buoyancy counteracting the effects of gravity. Squat jump is a vertical terrestrial push-off with a maximal lower limb extension limited by the gravity force, which attracts the body to the ground. Following this observation, we characterized the effects of environment (water vs...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29084092/acute-effects-of-active-ballistic-passive-and-proprioceptive-neuromuscular-facilitation-streching-on-sprint-and-vertical-jump-performance-in-trained-young-soccer-players
#15
Lucas de Paula Oliveira, Luiz Henrique Palucci Vieira, Rodrigo Aquino, João Paulo Vieira Manechini, Paulo Roberto Pereira Santiago, Enrico Fuini Puggina
The aim of the present study was to compare the acute effects of active (AC), ballistic (BA), passive (PA), proprioceptive neuromuscular facilitation stretching (PNF) methods on performance in vertical jumping, sit and reach, and sprinting in young soccer players. Twelve trained soccer players (17.67 ± 0.87 years) participated in the study. The jump height (H), peak power (PP), and relative power (RP) in the squat jump (SJ) and countermovement jump (CMJ), the range of motion (ROM), the rate of perceived exertion (RPE), and time (s) in 10-20-30 m sprints were evaluated...
October 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29083355/neuromuscular-recovery-in-acl-reconstruction-with-bone-tendon-patellar-bone-and-semitendinosus-gracilis-autograft
#16
Andrea Pasquini, Marco Jacopetti, Francesco Pogliacomi, Ileana Ramazzina, Cosimo Costantino
OBJECTIVE: Several different types of grafts have been used in ACL rupture. The purpose of the study was to compare the recovery of lower limbs muscle strength and proprioception in athletes, who underwent ACL reconstruction with Bone-Patellar-Tendon-Bone (BPTB) versus semitendinosus and gracilis (HS) autografts. METHODS: We enrolled 30 male amateur athletes. Each patient was evaluated by isokinetic test, triaxial accelerometer test and balance test with stabilometric platform...
October 18, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29072114/a-customised-cold-water-immersion-protocol-favours-one-size-fits-all-protocols-in-improving-acute-performance-recovery
#17
Coen S Zandvoort, Jelmer R de Zwart, Brenda L van Keeken, Patrick J F Viroux, Ivo J H Tiemessen
The purpose of the present study was to investigate whether a customised cold-water immersion (CWIc) protocol was more effective in enhancing acute performance recovery than a one-size-fits-all CWI (CWIs) or active recovery (AR) protocol. On three separate testing days, 10 healthy, physically active, non-smoking males completed the same fatiguing protocol (60 squat jumps and a 2'30″ all-out cycling time-trial) followed by CWIc (12°C, 10-17 min), CWIs (15°C, 10 min) or AR (60 W, 10 min). Outcome measures to assess acute recovery were heart rate variability (HRV) as HRVrecovery, muscle power (MP) as absolute and relative decline, and muscle soreness (MS) at 0 and 24 h...
October 26, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29065077/optimizing-half-squat-postactivation-potential-load-in-squat-jump-training-for-eliciting-relative-maximal-power-in-ski-jumpers
#18
Artur Gołaś, Michal Wilk, Petr Stastny, Adam Maszczyk, Katarzyna Pajerska, Adam Zając
Gołaś, A, Wilk, M, Stastny, P, Maszczyk, A, Pajerska, K, and Zając, A. Optimizing half squat postactivation potential load in squat jump training for eliciting relative maximal power in ski jumpers. J Strength Cond Res 31(11): 3010-3017, 2017-Training load manipulation in a single workout session can increase or decrease training effectiveness in terms of athletes' strength or power gains. In ski jumping, the complex training that elicits maximal power gains may take advantage of the postactivation potentiation (PAP) mechanism...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29059895/consistency-of-surface-electromyography-assessment-at-lower-limb-selected-muscles-during-vertical-countermovement
#19
Carlos Rodrigues, Miguel Correia, Joao M C S Abrantes, Jurandir Nadal, Marco A Benedetti Rodrigues
Given the difficulty of invasive methods to assess muscle action during natural human movement, surface electromyography (sEMG) has been increasingly used to capture muscle activity in relation to kinesiological analysis of specific tasks. Isolated isometric, concentric and eccentric forms of muscle action have been receiving the most attention for research purposes. Nevertheless natural muscle action frequently involves the use of a preceding eccentric muscle action as a form of potentiation of immediate muscle concentric action, in what is designated as muscle stretch-shortening cycle (SSC)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29023322/effects-of-two-different-training-periodization-models-on-physical-and-physiological-aspects-of-elite-female-team-handball-players
#20
Carmen Manchado, Juan M Cortell-Tormo, Juan Tortosa-Martínez
Manchado, C, Cortell-Tormo, JM, and Tortosa-Martínez, J. Effects of two different training periodization models on physical and physiological aspects of elite female team handball players. J Strength Cond Res XX(X): 000-000, 2017-This study was undertaken to compare training-induced changes in selected physiological and physical team handball performance factors after 2 training periodization models: traditional vs. block periodization (BP). Eleven female team handball players who played over 2 consecutive seasons for a Spanish first league team were assessed twice per season during a training cycle...
October 10, 2017: Journal of Strength and Conditioning Research
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