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"Countermovement jump"

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https://www.readbyqxmd.com/read/28538322/manifestations-of-proprioception-during-vertical-jumps-to-specific-heights
#1
Artur Struzik, Bogdan Pietraszewski, Adam Kawczyński, Sławomir Winiarski, Grzegorz Juras, Andrzej Rokita
Artur, S, Bogdan, P, Kawczyński, A, Winiarski, S, Grzegorz, J, and Andrzej, R. Manifestations of proprioception during vertical jumps to specific heights. J Strength Cond Res 31(6): 1694-1701, 2017-Jumping and proprioception are important abilities in many sports. The efficiency of the proprioceptive system is indirectly related to jumps performed at specified heights. Therefore, this study recorded the ability of young athletes who play team sports to jump to a specific height compared with their maximum ability...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538318/do-fencers-require-a-weapon-specific-approach-to-strength-and-conditioning-training
#2
Anthony N Turner, Chris J Bishop, Jon A Cree, Michael L Edwards, Shyam Chavda, Paul J Read, David M J Kirby
Turner, AN, Bishop, CJ, Cree, JA, Edwards, ML, Chavda, S, Read, PJ, and Kirby, DMJ. Do fencers require a weapon-specific approach to strength and conditioning training? J Strength Cond Res 31(6): 1662-1668, 2017-There are 3 types of weapons used in Olympic fencing: the épée, foil, and sabre. The aim of this study was to determine if fencers exhibited different physical characteristics across weapons. Seventy-nine male (n = 46) and female (n = 33) national standard fencers took part in this study. Fencers from each weapon (male and female), i...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538313/the-effects-of-accentuated-eccentric-loading-on-the-drop-jump-exercise-and-the-subsequent-postactivation-potentiation-response
#3
Lee A Bridgeman, Michael R McGuigan, Nicholas D Gill, Deborah K Dulson
Bridgeman, LA, McGuigan, MR, Gill, ND, and Dulson, DK. The effects of accentuated eccentric loading on the drop jump exercise and the subsequent postactivation potentiation response. J Strength Cond Res 31(6): 1620-1626, 2017-The aims of this study were (a) to investigate the acute effects of different drop jump (DJ) accentuated eccentric loading (AEL) protocols and (b) to investigate the effect of these AEL DJ protocols on subsequent countermovement jump (CMJ) performance. The subjects were 12 strength-trained athletes; initially, baseline CMJ performance was assessed and individual optimal DJ drop height identified...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538312/skeletal-muscle-contraction-time-and-tone-decrease-after-8-weeks-of-plyometric-training
#4
Damir Zubac, Boštjan Šimunič
Zubac, D and Šimunič, B. Skeletal muscle contraction time and tone decrease after 8 weeks of plyometric training. J Strength Cond Res 31(6): 1610-1619, 2017-The aim of the study was to examine whether an improvement in jumping performance after 8 weeks of plyometric training (PT) runs in parallel with changes in lower-limb skeletal muscle contractile properties. Using noninvasive tensiomyography (TMG), we assessed contraction time (Tc) and the maximal amplitude of radial displacement (Dm) in 20 subjects (50% men; age 22...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538311/intrasession-and-intersession-reliability-of-quadriceps-and-hamstrings-electromyography-during-a-standardized-hurdle-jump-test-with-single-leg-landing
#5
Mark T Cavanaugh, Saied Jalal Aboodarda, David G Behm
Cavanaugh, MT, Aboodarda, SJ, and Behm, DG. Intrasession and intersession reliability of quadriceps' and hamstrings' electromyography during a standardized hurdle jump test with single leg landing. J Strength Cond Res 31(6): 1601-1609, 2017-The objective of this study was to develop a standardized test to determine quadriceps and hamstrings muscle activation in a position emulating a noncontact anterior cruciate ligament injury. We assessed the intrasession and intersession reliability of surface electromyography (EMG) of the dominant leg after single-leg landing from a standardized hurdle jump...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538305/comparing-performance-during-morning-vs-afternoon-training-sessions-in-intercollegiate-basketball-players
#6
Aaron D Heishman, Michael A Curtis, Ethan N Saliba, Robert J Hornett, Steven K Malin, Arthur L Weltman
Heishman, AD, Curtis, MA, Saliba, EN, Hornett, RJ, Malin, SK, and Weltman, AL. Comparing performance during morning vs. afternoon training sessions in intercollegiate basketball players. J Strength Cond Res 31(6): 1557-1562, 2017-Time of day is a key factor that influences the optimization of athletic performance. Intercollegiate coaches oftentimes hold early morning strength training sessions for a variety of factors including convenience. However, few studies have specifically investigated the effect of early morning vs...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538302/physiological-demands-of-elite-cross-country-skiing-during-a-real-competition
#7
Cristina Gonzalez-Millan, Dario Perez-Brunicardi, Juan J Salinero, Beatriz Lara, Javier Abián-Vicen, Francisco Areces, Diana Ruiz-Vicente, Lidon Soriano, Juan Del Coso
Gonzalez-Millan, C, Perez-Brunicardi, D, Salinero, JJ, Lara, B, Abián-Vicen, J, Areces, F, Ruiz-Vicente, D, Soriano, L, and Del Coso, J. Physiological demands of elite cross-country skiing during a real competition. J Strength Cond Res 31(6): 1536-1543, 2017-The aim of this study was to assess different physiological variables before and after a 5-km (women) and 10-km (men) cross-country skiing competition to determine potential mechanisms of fatigue. Fourteen elite-level skiers competed in an official cross-country skiing competition using the classical style (9 men and 5 women)...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538294/effects-of-different-combinations-of-strength-power-and-plyometric-training-on-the-physical-performance-of-elite-young-soccer-players
#8
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
Kobal, R, Loturco, I, Barroso, R, Gil, S, Cuniyochi, R, Ugrinowitsch, C, Roschel, H, and Tricoli, V. Effects of different combinations of strength, power, and plyometric training on the physical performance of elite young soccer players. J Strength Cond Res 31(6): 1468-1476, 2017-The combination of strength (ST) and plyometric training (PT) has been shown to be effective for improving sport-specific performance. However, there is no consensus about the most effective way to combine these methods in the same training session to produce greater improvements in neuromuscular performance of soccer players...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28528435/benefits-of-a-regular-vs-irregular-rhythm-based-training-programme-on-physical-fitness-and-motor-skills-in-obese-girls
#9
Ghazi Racil, Wassim Elmontassar, Imen Rommene, Claire Tourny, Anis Chaouachi, Jeremy B Coquart
PURPOSE: The aim of the current study was to examine the impact of a physical exercise programme including rhythmic elements (regular and irregular tempos) on physiological variables, motor skills (MS), and jump performances in obese girls. METHODS: Thirty-six obese girls (age: 10.4 ± 0.9 years, body mass: 58.7 ± 4.0 kg, height: 1.37 ± 0.04 m, body mass index: 31.2 ± 2.1) participated in three weekly physical exercise sessions for 6 weeks, with each session consisting of basic fundamental locomotor movements...
May 20, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28513324/biomechanical-comparison-of-countermovement-jumps-performed-on-land-and-in-water-age-effects
#10
Talin Louder, Dennis Dolny, Eadric Bressel
CONTEXT: The aquatic environment provides a low impact alternative to land-based exercise and rehabilitation in older adults. OBJECTIVE: Evaluate the biomechanics of older adults and young adults performing jumping movements on land and in water. DESIGN AND SETTING: Cross-sectional, mixed-factorial experiment; adjustable-depth pool at sports medicine research facility. PARTICIPANTS: Fifty-six young adults (22.0±3.9years) and twelve healthy older adults (57...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28513281/short-term-effects-of-kinesio-taping-on-muscle-recruitment-order-during-a-vertical-jump-a-pilot-study
#11
Guillermo Mendez-Rebolledo, Rodrigo Ramirez-Campillo, Eduardo Guzman-Muñoz, Valeska Gatica-Rojas, Alexis Dabanch-Santis, Francisco Diaz-Valenzuela
CONTEXT: Kinesio taping is commonly used in sports and rehabilitation settings with the aim of prevention and treatment of musculoskeletal injuries. However, limited evidence exists regarding the effects of 24 and 72 h of kinesio taping on trunk and lower limb neuromuscular and kinetic performance during a vertical jump. OBJECTIVE: The purpose of this study was to analyze the short-term effects of kinesio taping on the height and ground reaction force during a vertical jump, in addition to trunk and lower limb muscle latency and recruitment order...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28513277/effect-of-gastrocnemius-kinesio-taping-on-countermovement-jump-performance-and-vertical-stiffness-following-muscle-fatigue
#12
Sahar Boozari, Mohammad Ali Sanjari, Ali Amiri, Ismail Ebrahimi Takamjani
CONTEXT: Kinesio Tape (KT) is a widely used intervention in the fields of sports and rehabilitation. However, its effects on lower extremity behavior during functional activities are not entirely known. OBJECTIVE: To test the hypothesis that application of KT can change performance and vertical stiffness during the countermovement jump (CMJ) before and after a fatigue protocol. DESIGN: A pre and post design to study the effect of KT in two situations, pre- and post-fatigue...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28503527/postactivation-potentiation-in-elite-young-soccer-players
#13
Adriano Titton, Emerson Franchini
The aim of this study was to investigate the acute effects of 16 different combinations to cause the postactivation potentiation (PAP) in elite young soccer players. Squat exercise in 4 different intensities (40%, 60%, 80%, and 100% one-repetition maximum [1RM]) was performed and its effects were evaluated in the performance of countermovement jump (CMJ), after 4 different recovery times (1, 3, 5, and 10 min). For this purpose, 25 young soccer players, underwent five experimental sessions. At the first session the control to determine 1RM in half-squat was carried out...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28488937/traditional-balance-and-slackline-training-are-associated-with-task-specific-adaptations-as-assessed-with-sensorimotor-tests
#14
Samuel Volery, Navrag Singh, Eling D de Bruin, Renate List, Marc Morten Jaeggi, Brigitte Mattli Baur, Silvio Lorenzetti
The purpose of this study was to measure alterations in sensorimotor skills and balance resulting from slackline training and conventional balance training. Forty-three physically fit subjects were randomized into three groups. Two groups practiced three times a week for 15 minutes, including at least once supervised session, on the slackline or perform conventional balance training for 6 weeks. The control group was not allowed to perform any balance training. Before and after the intervention, the subjects underwent sensorimotor and strength tests...
May 10, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28488924/effects-of-caffeine-on-countermovement-jump-performance-variables-in-elite-male-volleyball-players
#15
Hermann Zbinden-Foncea, Isabel Rada, Jesus Gomez, Marco Kokaly, Trent Stellingwerff, Louise Deldicque, Luis Peñailillo
PURPOSE: To examine the effects of a moderate dose of caffeine in elite male volleyball players on countermovement jump (CMJ) performance, as well as temporal concentric and eccentric phase effects. METHODS: Ten elite male volleyball players took part in two experimental days via a randomized cross-over trial 1 week apart in which they ingested either 5 mg/kg of caffeine or a placebo in double-blind fashion. Heart rate and blood pressure parameters were measured at rest and 60 min post-ingestion...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28488829/analyzing-the-relationship-between-anthropometric-and-motor-indices-with-basketball-specific-pre-planned-and-non-planned-agility-performances
#16
Miran Pehar, Nedim Sisic, Damir Sekulic, Milan Coh, Ognjen Uljevic, Miodrag Spasic, Ante Krolo, Kemal Idrizovic
BACKGROUND: Although agility is an important quality in basketball, factors associated with basketball specific pre-planned-agility (change-of-direction-speed - CODS) and non- planned-agility (reactive agility - RA) are rarely investigated. The aim of this study was to evaluate relationship between anthropometric and motor indices with basketball-specific CODS and RA in male basketball players of high performance level. METHODS: We tested 88 high-level male basketball players (height: 194...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28486339/acute-effect-of-upper-and-lower-body-postactivation-exercises-on-shot-put-performance
#17
Eleni I Kontoy, Fani Berberidou, Theophilos C Pilianidis, Nikolaos I Mantzouranis, Spyridon K Methenitis
The purpose of the present study was to investigate the effect of different types of upper and lower' extremities exercises on acute increase of shot put performance, in moderate experienced throwers. Eight (n=8) males and nine (n=9) female throwers participated in the present study. Their bench press and squat maximum strength were measured while their shot put performance from power position was evaluated before and after four interventions: [1] plyometric push-ups (Plyo), [2] 6s isometric push-ups (Iso), [3] 3 countermovement jumps (CMJ) and [4] 10 reps...
May 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28483560/the-influence-of-a-12-carbohydrate-electrolyte-beverage-on-self-paced-soccer-specific-exercise-performance
#18
Liam D Harper, Emma J Stevenson, Ian Rollo, Mark Russell
OBJECTIVES: To assess the physiological and performance effects of a 12% carbohydrate-electrolyte beverage consumed at practically applicable time-points (i.e., before each half) throughout simulated soccer match-play. DESIGN: Randomised, counterbalanced, crossover. METHODS: Fed players (n=15) performed 90-min of soccer-specific exercise (including self-paced exercise at the end of each half). Players consumed carbohydrate-electrolyte (CHO; 60g×500ml(-1), Na(+) 205mg×500ml(-1)), placebo-electrolyte (PL) or water (Wat) beverages at the end of the warm-up (250ml) and half-time (250ml plus ad-libitum water)...
April 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28445230/comparison-between-unilateral-and-bilateral-plyometric-training-on-single-and-double-leg-jumping-performance-and-strength
#19
Gregory C Bogdanis, Athanasios Tsoukos, Olga Kaloheri, Gerasimos Terzis, Panagiotis Veligekas, Lee E Brown
This study compared the effects of unilateral and bilateral plyometric training on single and double-leg jumping performance, maximal strength and rate of force development (RFD). Fifteen moderately trained subjects were randomly assigned to either a unilateral (U, n=7) or bilateral group (B, n=8). Both groups performed maximal effort plyometric leg exercises two times per week for 6 weeks. The B group performed all exercises with both legs, while the U group performed half the repetitions with each leg, so that total exercise volume was the same...
April 18, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28433808/comparisons-of-hip-strength-and-countermovement-jump-height-in-elite-tennis-players-with-and-without-acute-history-of-groin-injuries
#20
V Moreno-Pérez, A Lopez-Valenciano, D Barbado, J Moreside, J L L Elvira, F J Vera-Garcia
BACKGROUND: Despite the high groin-injury (GI) prevalence in tennis, no studies have assessed the extent to which intrinsic groin injury risk factors, such as hip muscle strength, have recovered in elite tennis players with a history of previous GI. OBJECTIVE: To investigate whether elite tennis players with a history of GI show differences in hip strength and jump height between injured and uninjured limbs and compared with dominant limb in tennis players without history of acute groin-injuries (NGI)...
June 2017: Musculoskeletal Science & Practice
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