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Lachlan P James, Paul Comfort, Timothy J Suchomel, Vincent G Kelly, Emma M Beckman, G Gregory Haff
The purpose of this investigation was to determine whether weightlifting actions are a viable method for improving athletic performance amongst weaker, inexperienced lifters when compared to individuals with a greater power clean result, and hence weightlifting ability and experience. Two groups of males with distinctly different power clean performances (higher performance (HP): N = 8; BM = 78.1±4.0 kg; 1RM PC = 1.08±0.09 kgBM; lower performance (LP): N = 8; BM=82.6±14.0 kg; 1RM PC=0.78±0.1 kg·BM) and resistance training age (HP: resistance training experience=3...
March 14, 2018: Journal of Strength and Conditioning Research
Phillip T Chandler, Matthew Greig, John J McMahon
The aim of this study was to investigate changes in vertical jump technique over the course of a training session. Twelve plyometric and ballistic exercise trained male athletes (age = 23.4 ± 4.6 years, body mass = 78.7 ± 18.8 kg, height = 177.1 ± 9.0 cm) performed three sets of 10 repetitions of drop (DJ), rebound (RJ) and squat jumps (SJ). Each exercise was analysed from touch down to peak joint flexion and peak joint flexion to take-off. SJ where analysed from peak joint flexion to take-off only. Jump height, flexion and extension time and range of motion, and instantaneous angles of the ankle, knee and hip joints were measured...
March 13, 2018: Journal of Strength and Conditioning Research
Andrew J Kossow, Tyler G DeChiara, Steve M Neahous, William P Ebben
Plyometric exercises are frequently performed as part of a strength and conditioning program. Most studies assessed the kinetics of plyometric exercises primarily performed in the vertical plane. The purpose of this study was to evaluate the multi-planar kinetic characteristics of a variety of plyometric exercises, which have a significant horizontal component. This study also sought to assess sex differences in the intensity progression of these exercises. Ten men and ten women served as subjects. The subjects performed a variety of plyometric exercises including the double leg hop, standing long jump, single leg standing long jump, bounding, skipping, power skipping, cone hops, and 45...
March 12, 2018: Journal of Strength and Conditioning Research
Ichrak Bouteraa, Yassine Negra, Roy J Shephard, Mohamed Souhaiel Chelly
The purpose of this study was to examine the effect of 8 weeks combined balance and plyometric training on the physical fitness of female adolescent basketball players. Twenty six healthy regional-level players were randomly assigned to either an experimental group (E; n = 16, age = 16.4 ± 0.5) or a control group (C; n = 10, age = 16.5 ± 0.5). C maintained their normal basketball training schedule, whereas for 8 weeks E replaced a part of their standard regimen by biweekly combined training sessions. Testing before and after training included the Squat Jump (SJ), Countermovement Jump (CMJ), Drop Jump (DJ), 5, 10 and 20-m sprints, Stork Balance Test (SBT), Y-Balance Test (YBT) and Modified Illinois Change of Direction Test (MICODT)...
February 27, 2018: Journal of Strength and Conditioning Research
Kemal Idrizovic, Bahri Gjinovci, Damir Sekulic, Ognjen Uljevic, Paulo Vicente João, Miodrag Spasic, Tine Sattler
PURPOSE: This study compared the effects of skill-based and plyometric conditioning (both performed in addition to regular volleyball training twice a week for 12 wk) on fitness parameters in female junior volleyball players. METHODS: The participants [n = 47; age: 16.6 (0.6) y; mass: 59.4 (8.1) kg; height: 175.1 (3.0) cm] were randomized into a plyometric (n = 13), a skill-based (n = 17), and a control (n = 17) groups. The variables included body height, body mass, calf girth, calf skinfold, corrected calf girth, countermovement jump, 20-m-sprint, medicine ball toss, and sit-and-reach test...
February 24, 2018: Pediatric Exercise Science
Rodrigo Ramirez-Campillo, Cristian Álvarez, Antonio García-Hermoso, Robinson Ramírez-Vélez, Paulo Gentil, Abbas Asadi, Helmi Chaabene, Jason Moran, Cesar Meylan, Antonio García-de-Alcaraz, Javier Sanchez-Sanchez, Fabio Y Nakamura, Urs Granacher, William Kraemer, Mikel Izquierdo
Recently, there has been a proliferation of published articles on the effect of plyometric jump training, including several review articles and meta-analyses. However, these types of research articles are generally of narrow scope. Furthermore, methodological limitations among studies (e.g., a lack of active/passive control groups) prevent the generalization of results, and these factors need to be addressed by researchers. On that basis, the aims of this scoping review were to (1) characterize the main elements of plyometric jump training studies (e...
February 22, 2018: Sports Medicine
Margaret T Jones, Jonathan M Oliver, John C Delgado, Justin J Merrigan, Andrew R Jagim, Charles E Robison
To determine if chain bench press (BP) exercise would enhance acute upper body force and power, 13 collegiate male wrestlers (mean ± SD; 20.5 ± 1 years; 174.3 ± 4.2 cm; 76.5 ± 8.3 kg) with ≥ 1 year of strength training participated. Session 1 included body composition ((BodPod) 8.5 ± 2.6 %body fat)), 3 repetition maximum (RM) BP, and familiarization with the plyometric push-up (PPU) on a force plate. Athletes were matched for 3RM BP and randomly assigned to one of two groups: Chain BP or Plate BP. One week after Session 1, athletes performed the experimental protocol which consisted of: Baseline PPU, Chain/Plate BP Set 1 (6 reps @ 60%), 30 sec rest, PPU, 3 min rest, Chain/Plate BP Set 2 (6 reps @60%), 30 sec rest, and PPU...
February 20, 2018: Journal of Strength and Conditioning Research
Terrance A Sgroi, John M Zajac
PURPOSE OF REVIEW: Throwing places high demands on the human body, and specific characteristics are developed over time unique to these athletes. When returning to throw after injury, it is important to follow a criterion-based progression that allows the body to be prepared appropriately for the stresses that throwing will require. There is currently a void in the literature for criteria-based progression that helps these athletes return to the highest level of play. RECENT FINDINGS: As injury rates continue to rise in baseball, there is increased evidence showing contributions of the core and lower extremity to the baseball pitch...
March 2018: Current Reviews in Musculoskeletal Medicine
Athanasios Chatzinikolaou, Konstantinos Michaloglou, Alexandra Avloniti, Diamanda Leontsini, Chariklia K Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Sotirios Arsenis, Ioannis Athanailidis, Dimitrios Draganidis, Athanasios Z Jamurtas, Craig A Williams, Ioannis G Fatouros
PURPOSE: Τo investigate the effect of a complex, short-term strength/power training protocol on performance and body composition of elite early-adolescent soccer players. METHODS: Twenty-two players (14-15 years) were randomly assigned to (a) an experimental (EG, n=12, participated in a 5-week training protocol with traditional multi-joint power resistance exercises, Olympic-style lifts, plyometric drills and speed work, four times/week) or (b) a control group (CG, n=10)...
February 12, 2018: International Journal of Sports Physiology and Performance
David G Behm
The pressure for children to excel and succeed in sport continues to mount. Although resistance training for youth was in disfavor by many organizations even into the early 21st century, children's training programs are more closely resembling the volume and intensity of adult programs. The physiological maturation of adolescent youth may impact their response to advanced training programs. Furthermore, the pressure to specialize in specific sports rather than engage in a variety of sporting activities may affect not only training responses but also injury incidence...
February 9, 2018: Pediatric Exercise Science
Jung-Gyu Yoon
[Purpose] The purpose of this study was to examine correlations between measurement time and different expansibility of the elastic tape on the rectus femoris and body sway index with plyometric exercise. [Subjects and Methods] The subjects of this study were 24 healthy men. C90 area, C90 angle, trace length, sway average velocity for body sway index were measured using a force plate by BT4. The collected data were analyzed using Kendall's coefficient of concordance. [Results] All of body sway index on measuring follow up 24 hours after removing tape were significantly decreased than before and right after plyometric exercise...
January 2018: Journal of Physical Therapy Science
Raja Bouguezzi, Helmi Chaabene, Yassine Negra, Rodrigo Ramirez-Campillo, Zied Jlalia, Bessem Mkaouer, Younés Hachana
This study aimed to compare the effects of one vs. two sessions of equal-weekly volume plyometric training (PT) across 8 weeks on measures of athletic performance (i.e., sprint-time, change of direction [CoD], jumping ability, and muscle strength) in prepuberal male soccer players. Thirty participants were randomly assigned either to one session PT group (1SPT [n=15]) or two sessions PT group (2SPT [n=15]). Plyometric training was integrated into their regular soccer training routine. Pre- and post-training tests for the assessment of sprint-time (e...
February 1, 2018: Journal of Strength and Conditioning Research
Abed Fathi, Raouf Hammami, Jason Moran, Rihab Borji, Sonia Sahli, Haithem Rebai
The purpose of this study was to determine the effects of 16 weeks of combined strength and plyometric training or plyometric training alone, and how a detraining program can modify adaptations in response to the training stimulus. Sixty male volleyball players (circa PHV:-1 to +1 years from PHV) were assigned to a Combined Training group (CTG) (n=20), a Plyometric Training group (PTG) (n=20) or a control group (CG) (n=20). The experimental groups (CTG and PTG) participated in training twice weekly for 16 weeks...
February 1, 2018: Journal of Strength and Conditioning Research
Jacopo Antonino Vitale, Antonio La Torre, Giuseppe Banfi, Matteo Bonato
The aim of the present randomized controlled trial was to evaluate the effects of an 8-weeks neuromuscular training program focused on core stability, plyometric, and body-weight strengthening exercises on dynamic-postural control and vertical jump performance in elite junior skiers. Twenty-four Italian elite junior male skiers were recruited and randomized to either an experimental group, performing neuromuscular warm-up exercises, (EG; n = 12; age 18 ± 1 years; body mass 66 ± 21 kg; height 1.70 ± 0.1 m) or a control group involved in a standard warm-up (CG; n = 12; age 18 ± 1 years; body mass 62 ± 14 kg; height 1...
February 1, 2018: Journal of Strength and Conditioning Research
Terrance A Sgroi, Michelle Cilenti
PURPOSE OF REVIEW: With improvements in surgical techniques and increased knowledge of rotator cuff healing, there was a need to identify a safe progression after rotator cuff repair. The rehabilitation specialist plays an integral role in the care of these patients, and by implementing an evidence and criteria-based model, patients may be able to return to their prior levels of function sooner with fewer complications. RECENT FINDINGS: Timing of progression for rotator cuff patients should align not only with healing but also potential strain on the involved tissue...
February 5, 2018: Current Reviews in Musculoskeletal Medicine
Tanja Spencer, Sara Aldous, Gavin Williams, Michael Fahey
AIM: The objective of this paper was to systematically review the efficacy of interventions targeting high-level mobility skills in people with a neurological impairment. METHODS: A comprehensive electronic database search was conducted. Study designs were graded using the American Academy of Cerebral Palsy and Developmental Medicine (AACPDM) system and methodological quality was described using the Physiotherapy Evidence Database (PEDro) scale. RESULTS: Twelve exploratory studies (AACPDM levels IV/V), of limited methodological quality (PEDro scores of 2-3 out of 10), were included...
2018: Brain Injury: [BI]
Rodrigo Ramirez-Campillo, Cristian Alvarez, Felipe García-Pinillos, Javier Sanchez-Sanchez, Javier Yanci, Daniel Castillo, Irineu Loturco, Helmi Chaabene, Jason Moran, Mikel Izquierdo
This study aimed to compare the effects of drop-jump training using a fixed drop-box height (i.e., 30-cm [FIXED]) versus an optimal drop-box height (i.e, 10-cm to 40-cm: generating an optimal [OPT] reactive strength index [RSI]) in youth soccer players' physical fitness. Athletes were randomly allocated to a control-group (CG: n=24; age=13.7 years), a fixed drop-box height group (FIXED, n=25; age=13.9 years) or an optimal drop-box height group (OPT, n=24; age=13.1 years). Before and after 7 weeks of training, tests for the assessment of jumping (countermovement jump [CMJ], five multiple bounds [MB]), speed (20-m sprint time), change of direction (Illinois change of direction test [CODT]), strength (RSI and 5 maximal squat repetition test [5RM]), endurance (2...
January 30, 2018: Journal of Strength and Conditioning Research
Ricardo Berton, Manoel E Lixandrão, Claudio M Pinto E Silva, Valmor Tricoli
Jump performance is considered an important factor in many sports. Thus, strategies such as weightlifting (WL) exercises, traditional resistance training (TRT) and plyometric training (PT) are effective at improving jump performance. However, it is not entirely clear which of these strategies can enable greater improvements on jump height. Thus, the purpose of the meta-analysis was to compare the improvements on countermovement jump (CMJ) performance between training methods which focus on WL exercises, TRT, and PT...
February 1, 2018: Journal of Sports Sciences
Timothy J Suchomel, Sophia Nimphius, Christopher R Bellon, Michael H Stone
This review covers underlying physiological characteristics and training considerations that may affect muscular strength including improving maximal force expression and time-limited force expression. Strength is underpinned by a combination of morphological and neural factors including muscle cross-sectional area and architecture, musculotendinous stiffness, motor unit recruitment, rate coding, motor unit synchronization, and neuromuscular inhibition. Although single- and multi-targeted block periodization models may produce the greatest strength-power benefits, concepts within each model must be considered within the limitations of the sport, athletes, and schedules...
January 25, 2018: Sports Medicine
Mehrez Hammami, Nawel Gaamouri, Roy J Shephard, Mohamed Souhaiel Chelly
The aim was to compare the effects of two differing 8-week in-season strength training programs (contrast strength training [CST] vs. plyometric training [PT]) on selected performance tests (5 and 40m sprints, S 4 X 5 m change of direction test, squat (SJ) and countermovement (CMJ) jumps , leg peak power on a cycle ergometer force-velocity test, 1-repetition maximal (1-RM) half squat, and electromyographic [EMG] activity of the vastus lateralis, vastus medialis and rectus femoris muscles during vertical jump tests)...
January 17, 2018: Journal of Strength and Conditioning Research
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