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https://www.readbyqxmd.com/read/29431546/the-trainability-of-adolescent-soccer-players-to-brief-periodized-complex-training
#1
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
https://www.readbyqxmd.com/read/29424273/neuromuscular-physiology-exercise-and-training-during-youth-the-year-that-was-2017
#2
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
https://www.readbyqxmd.com/read/29401202/effects-of-different-plyometric-training-frequency-on-measures-of-athletic-performance-in-prepuberal-male-soccer-players
#3
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
https://www.readbyqxmd.com/read/29401199/effect-of-a-16-week-combined-strength-and-plyometric-training-program-followed-by-a-detraining-period-on-athletic-performance-in-pubertal-volleyball-players
#4
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
https://www.readbyqxmd.com/read/29401197/effects-of-an-8-weeks-body-weight-neuromuscular-training-on-dynamic-balance-and-vertical-jump-performances-in-elite-junior-skiing-athletes-a-randomized-controlled-trial
#5
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
https://www.readbyqxmd.com/read/29399735/rotator-cuff-repair-post-operative-rehabilitation-concepts
#6
REVIEW
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
https://www.readbyqxmd.com/read/29393688/systematic-review-of-high-level-mobility-training-in-people-with-a-neurological-impairment
#7
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...
February 2, 2018: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29389692/optimal-reactive-strength-index-is-it-an-accurate-variable-to-optimize-plyometric-training-effects-on-measures-of-physical-fitness-in-young-soccer-players
#8
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
https://www.readbyqxmd.com/read/29385904/effects-of-weightlifting-exercise-traditional-resistance-and-plyometric-training-on-countermovement-jump-performance-a-meta-analysis
#9
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
https://www.readbyqxmd.com/read/29372481/the-importance-of-muscular-strength-training-considerations
#10
REVIEW
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
https://www.readbyqxmd.com/read/29351161/effects-of-contrast-strength-vs-plyometric-training-on-lower-limb-explosive-performance-ability-to-change-direction-and-neuromuscular-adaptation-in-soccer-players
#11
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
https://www.readbyqxmd.com/read/29339987/physiological-demands-morphological-characteristics-physical-abilities-and-injuries-of-female-soccer-players
#12
Zoran Milanović, Goran Sporiš, Nic James, Nebojša Trajković, Aleksandar Ignjatović, Hugo Sarmento, Athos Trecroci, Bruno Miguel Borges Mendes
The popularity of female soccer is increasing as well as the number of females playing soccer. Similarly, over the last twenty or so years, research in soccer has increased significantly, but a large disparity exists in the volume of studies involving male and female players. As a consequence of this, female players remain less well understood compared to males. The purpose of the present narrative review was to describe morphological characteristics, physiological demands, physical abilities and injuries in female soccer players...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29337833/effects-of-plyometric-and-resistance-training-on-muscle-strength-explosiveness-and-neuromuscular-function-in-young-adolescent-soccer-players
#13
Brandon John McKinlay, Phillip Wallace, Raffy Dotan, Devon Long, Craig Tokuno, David Gabriel, Bareket Falk
This study examined the effect of 8-weeks of free-weight-resistance (RT) and plyometric (PLYO) training on maximal strength, explosiveness and jump performance compared with no added training (CON), in young male soccer players. Forty-one 11[FIGURE DASH]13-year-old soccer players were divided into three groups (RT, PLYO, CON). All participants completed isometric and dynamic (240°/s) knee extensions pre- and post-training. Peak torque (pT), peak rate of torque development (pRTD), electromechanical-delay (EMD), rate of muscle activation (Q50), m...
January 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29315164/effects-of-strength-training-on-postpubertal-adolescent-distance-runners
#14
Richard C Blagrove, Louis P Howe, Emily J Cushion, Adam Spence, Glyn Howatson, Charles R Pedlar, Philip R Hayes
PURPOSE: Strength training activities have consistently been shown to improve running economy (RE) and neuromuscular characteristics, such as force producing ability and maximal speed, in adult distance runners. However the effects on adolescent (<18 years) runners remains elusive. This randomized control trial aimed to examine the effect of strength training on several important physiological and neuromuscular qualities associated with distance running performance. METHODS: Participants (n=25, 13 female, 17...
January 8, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29314903/national-athletic-trainers-association-position-statement-prevention-of-anterior-cruciate-ligament-injury
#15
Darin A Padua, Lindsay J DiStefano, Timothy E Hewett, William E Garrett, Stephen W Marshall, Grace M Golden, Sandra J Shultz, Susan M Sigward
OBJECTIVE:   To provide certified athletic trainers, physicians, and other health care and fitness professionals with recommendations based on current evidence regarding the prevention of noncontact and indirect-contact anterior cruciate ligament (ACL) injuries in athletes and physically active individuals. BACKGROUND:   Preventing ACL injuries during sport and physical activity may dramatically decrease medical costs and long-term disability. Implementing ACL injury-prevention training programs may improve an individual's neuromuscular control and lower extremity biomechanics and thereby reduce the risk of injury...
January 9, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29281133/the-impact-of-strength-level-on-adaptations-to-combined-weightlifting-plyometric-and-ballistic-training
#16
Lachlan P James, G Gregory Haff, Vincent G Kelly, Mark Connick, Ben Hoffman, Emma M Beckman
The purpose of this investigation was to determine if the magnitude of adaptation to integrated ballistic training is influenced by initial strength level. Such information is needed to inform resistance training guidelines for both higher- and lower-level athlete populations. To this end, two groups of distinctly different strength levels (stronger: one-repetition-maximum (1RM) squat = 2.01 ± 0.15 kg. BM-1 ; weaker: 1.20 ± 0.20 kg. BM-1 ) completed 10 weeks of resistance training incorporating weightlifting derivatives, plyometric actions and ballistic exercises...
December 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29260403/bilateral-deficit-of-spring-like-behaviour-during-hopping-in-sprinters
#17
Mitsuo Otsuka, Toshiyuki Kurihara, Tadao Isaka
PURPOSE: Unilateral leg stiffness is a key contributor to sprint running speed, thereby great bilateral deficit (BLD) of leg stiffness would be expected to be observed in sprinters. However, it remains clear only BLD of leg stiffness at the preferred hopping frequency in non-sprinters. The purpose of this study was to clarify the BLD of spring-like behaviour in hopping at various frequencies and the effect of chronic adaptation via sprint running experience on BLD during the hopping. METHODS: Fifteen male experienced sprinters and 12 male novices participated in this study...
December 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29249987/imbalances-in-the-development-of-muscle-and-tendon-as-risk-factor-for-tendinopathies-in-youth-athletes-a-review-of-current-evidence-and-concepts-of-prevention
#18
REVIEW
Falk Mersmann, Sebastian Bohm, Adamantios Arampatzis
Tendons feature the crucial role to transmit the forces exerted by the muscles to the skeleton. Thus, an increase of the force generating capacity of a muscle needs to go in line with a corresponding modulation of the mechanical properties of the associated tendon to avoid potential harm to the integrity of the tendinous tissue. However, as summarized in the present narrative review, muscle and tendon differ with regard to both the time course of adaptation to mechanical loading as well as the responsiveness to certain types of mechanical stimulation...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29249083/effects-of-strength-training-on-the-physiological-determinants-of-middle-and-long-distance-running-performance-a-systematic-review
#19
REVIEW
Richard C Blagrove, Glyn Howatson, Philip R Hayes
BACKGROUND: Middle- and long-distance running performance is constrained by several important aerobic and anaerobic parameters. The efficacy of strength training (ST) for distance runners has received considerable attention in the literature. However, to date, the results of these studies have not been fully synthesized in a review on the topic. OBJECTIVES: This systematic review aimed to provide a comprehensive critical commentary on the current literature that has examined the effects of ST modalities on the physiological determinants and performance of middle- and long-distance runners, and offer recommendations for best practice...
December 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29238253/plyometric-training-improves-sprinting-jumping-and-throwing-capacities-of-high-level-female-volleyball-players-better-than-skill-based-conditioning
#20
Bahri Gjinovci, Kemal Idrizovic, Ognjen Uljevic, Damir Sekulic
There is an evident lack of studies on the effectiveness of plyometric- and skill-based-conditioning in volleyball. This study aimed to evaluate effects of 12-week plyometric- and volleyball-skill-based training on specific conditioning abilities in female volleyball players. The sample included 41 high-level female volleyball players (21.8 ± 2.1 years of age; 1.76 ± 0.06 cm; 60.8 ± 7.0 kg), who participated in plyometric- (n = 21), or skill-based-conditioning-program (n = 20). Both programs were performed twice per week...
December 2017: Journal of Sports Science & Medicine
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