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Strength and conditioning, Athlete

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https://www.readbyqxmd.com/read/28640770/physiological-responses-and-time-motion-analysis-of-small-combat-games-in-kickboxing-impact-of-ring-size-and-number-of-within-round-sparring-partners
#1
Ibrahim Ouergui, Nizar Houcine, Hamza Marzouki, Philip Davis, Emerson Franchini, Nabil Gmada, Ezzedine Bouhlel
Ouergui, I, Houcine, N, Marzouki, H, Davis, P, Franchini, E, Gmada, N, and Bouhlel, E. Physiological responses and time-motion analysis of small combat games in kickboxing: impact of ring size and number of within-round sparring partners. J Strength Cond Res 31(7): 1840-1846, 2017-The study aimed to investigate the physiological responses and time-structure of small combat games (SCGs) in kickboxing according to ring sizes and number of sparring partners. Twenty athletes from regional (n = 13) and national levels (n = 7) participated in the study (mean ± SD, age: 20...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28630601/international-society-of-sports-nutrition-position-stand-diets-and-body-composition
#2
REVIEW
Alan A Aragon, Brad J Schoenfeld, Robert Wildman, Susan Kleiner, Trisha VanDusseldorp, Lem Taylor, Conrad P Earnest, Paul J Arciero, Colin Wilborn, Douglas S Kalman, Jeffrey R Stout, Darryn S Willoughby, Bill Campbell, Shawn M Arent, Laurent Bannock, Abbie E Smith-Ryan, Jose Antonio
Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on a critical analysis of the literature regarding the effects of diet types (macronutrient composition; eating styles) and their influence on body composition. The ISSN has concluded the following. 1) There is a multitude of diet types and eating styles, whereby numerous subtypes fall under each major dietary archetype. 2) All body composition assessment methods have strengths and limitations. 3) Diets primarily focused on fat loss are driven by a sustained caloric deficit...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28605232/sensorimotor-control-of-the-shoulder-in-professional-volleyball-players-with-isolated-infraspinatus-muscle-atrophy
#3
Samuele Contemori, Andrea Biscarini, Fabio Massimo Botti, Daniele Busti, Roberto Panichi, Vito Enrico Pettorossi
CONTEXT: Isolated infraspinatus muscle atrophy (IIMA) only affects the hitting shoulder of overhead-activity athletes, and is caused by suprascapular nerve neuropathy. No study has assessed the static and dynamic stability of the shoulder in overhead professional athletes with IIMA to reveal possible shoulder sensorimotor alterations. OBJECTIVE: To assess the shoulder static stability, dynamic stability, and strength in professional volleyball players with IIMA and in healthy control players...
June 12, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28597618/effects-of-resistance-training-overtraining-and-early-specialization-on-youth-athletes
#4
Benjamin K Walters, Connor R Read, A Reed Estes
INTRODUCTION: In 2014, 60 million youth ages 6-18 participated in some form of generalized athletics. 3.5 million children are injured annually participating in organized sport or recreational activities. While sound physical education can decrease the burden of youth sports injuries, the median annual physical education budget of $764 for United States elementary, middle and high schools may not allow enough flexibility to apply evidenced-based guidelines. EVIDENCE ACQUISITION: The topics were selected after a careful review of the 2016 National Strength and Conditioning Association Position Statement on Long-Term Athletic Development...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597081/effects-of-bright-and-blue-light-on-acoustic-reaction-time-and-maximum-handgrip-strength-in-male-athletes-a-randomized-controlled-trial
#5
Raphael Knaier, Juliane Schäfer, Anja Rossmeissl, Christopher Klenk, Henner Hanssen, Christoph Höchsmann, Christian Cajochen, Arno Schmidt-Trucksäss
PURPOSE: To assess which type of evening light exposure has the greatest effect on reaction time and maximum handgrip strength. These were pre-specified secondary outcomes in a trial which primarily investigated the influence of light on cycling performance. METHODS: Seventy-four male athletes were allocated at random to either bright light (BRIGHT), monochromatic blue light (BLUE), or a control condition (CONTROL). Light exposure lasted for 60 min and started 17 h after the individual midpoint of sleep...
June 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28593094/anodal-transcranial-direct-current-stimulation-tdcs-increases-isometric-strength-of-shoulder-rotators-muscles-in-handball-players
#6
Fuad Ahmad Hazime, Ronaldo Alves da Cunha, Renato Rozenblit Soliaman, Ana Clara Bezerra Romancini, Alberto de Castro Pochini, Benno Ejnisman, Abrahão Fontes Baptista
BACKGROUND: Weakness of the rotator cuff muscles can lead to imbalances in the strength of shoulder external and internal rotators, change the biomechanics of the glenohumeral joint and predispose an athlete to injury. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has demonstrated promising results in a variety of health conditions. However few studies addressed its potential approach in the realm of athletics. HYPOTHESIS/PURPOSE: The purpose of this study was to investigate if transcranial direct current stimulation (tDCS) technique increases the isometric muscle strength of shoulder external and internal rotators in handball athletes...
June 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28561870/physical-therapist-students-perceptions-from-performing-strength-and-conditioning-training-academic-professional-and-clinical-benefits
#7
Kelly M Meiners, Christina M Wisdom
BACKGROUND: The purpose of this qualitative study was to assess the perceptions of Doctor of Physical Therapy (DPT) students in performing collegiate athletes' strength and conditioning training. METHODS: Four DPT students with the Certified Strength and Conditioning Specialist (CSCS) credential voluntarily provided collegiate athletes strength and conditioning training. Students were interviewed to obtain their perceptions of how the experience impacted performance in DPT school and perceptions of anticipated future benefits...
2017: Journal of Allied Health
https://www.readbyqxmd.com/read/28558445/the-effect-of-beach-volleyball-training-on-muscle-performance-of-indoor-volleyball-players
#8
Dimitrios G Balasas, Kosmas Christoulas, Panagiotis Stefanidis, Efstratios Vamvakoudis, Theodoros M Bampouras
BACKGROUND: Beach volleyball is frequently used as a conditioning activity for indoor volleyball players, but little information exists regarding any performance benefits when transitioning from sand to hard court. The present study examined the effect of 12 weeks beach volleyball training on muscle performance of indoor volleyball players. METHODS: Eleven athletes who completed an indoor volleyball season and were willing to train and compete at beach volleyball, participated in the study...
May 30, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28538315/evaluation-of-the-effectiveness-of-compression-garments-on-autonomic-nervous-system-recovery-after-exercise
#9
Alessandro Piras, Giorgio Gatta
The aim of this investigation was to evaluate the recovery pattern of a whole-body compression garment on hemodynamic parameters and on autonomic nervous system (ANS) activity after a swimming performance. Ten young male athletes were recruited and tested in 2 different days, with and without wearing the garment during the recovery phase. After a warm-up of 15 minutes, athletes were instructed to perform a maximal 400-m freestyle swimming event, and then time series of beat-to-beat intervals for heart rate variability (HRV), baroreflex sensitivity (BRS), and hemodynamic parameters were recorded for 90 minutes of recovery...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538314/do-neuromuscular-dentistry-designed-mouthguards-enhance-dynamic-movement-ability-in-competitive-athletes
#10
Joshua A Cotter, Steve T Jamison, Sarah A Schloemer, Ajit M W Chaudhari
Cotter, JA, Jamison, ST, Schloemer, SA, and Chaudhari, AMW. Do neuromuscular dentistry-designed mouthguards enhance dynamic movement ability in competitive athletes? J Strength Cond Res 31(6): 1627-1635, 2017-The purpose of this study was to examine the effect of a neuromuscular dentistry-designed mouthguard (NMDD) on dynamic movement ability. Forty-two competitive athletes (8 women, 21.9 ± 2.9 years, 66.8 ± 18.8 kg, 1.68 ± 0.11 m; 34 men, 22.8 ± 4.8 years, 77.4 ± 12.7 kg, 1.78 ± 0.08 m) with greater than 2 years' experience in their designated sport were enrolled in the study...
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
#11
Lee A Bridgeman, Michael R McGuigan, Nicholas D Gill, Deborah K Dulson
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. In subsequent weeks, subjects completed 1 set of 5 DJs with no additional load or an AEL of 10, 20, or 30% of their individual body mass (BM) using dumbbells to provide the extra load...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538307/can-cold-water-immersion-enhance-recovery-in-elite-olympic-weightlifters-an-individualized-perspective
#12
Jan Schimpchen, Maximilian Wagner, Alexander Ferrauti, Michael Kellmann, Mark Pfeiffer, Tim Meyer
We investigated whether cold water immersion (CWI) after intensive training sessions can enhance recovery in elite Olympic weightlifters, taking into account each athlete's individual response pattern. The entire German male Olympic weightlifting national team participated in the study (n = 7), ensuring collection of data from elite athletes only. Using a randomized cross-over design, the athletes went through 2 high-intensity training microcycles consisting of 5 training sessions that were either followed by a CWI or passive recovery...
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
#13
Aaron D Heishman, Michael A Curtis, Ethan N Saliba, Robert J Hornett, Steven K Malin, Arthur L Weltman
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. late afternoon strength training on performance indices of fatigue. This is athletically important because circadian and/or ultradian rhythms and alterations in sleep patterns can affect training ability. Therefore, the purpose of the present study was to examine the effects of morning vs...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28523517/body-size-of-male-youth-soccer-players-1978-2015
#14
REVIEW
Robert M Malina, António J Figueiredo, Manuel J Coelho-E-Silva
BACKGROUND: Studies of the body size and proportions of athletes have a long history. Comparisons of athletes within specific sports across time, though not extensive, indicate both positive and negative trends. OBJECTIVE: To evaluate secular variation in heights and weights of male youth soccer players reported in studies between 1978 and 2015. METHODS: Reported mean ages, heights, and weights of male soccer players 9-18 years of age were extracted from the literature and grouped into two intervals: 1978-99 and 2000-15...
May 18, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28515835/the-effect-of-acute-hyperglycemia-on-muscular-strength-power-and-endurance
#15
Franklin Lime-Ma, Joshua A Cotter, Evan E Schick
The purpose of this study was to elucidate the impact of acute hyperglycemia on skeletal muscle strength, power, and endurance. Ten male collegiate athletes (age 21.5 ± 1.5 years, height 186 ± 2.03 cm, body mass 108.8 ± 7.6 kg) participated in 2 testing sessions, separated by 7 days and randomized for either high glucose (HG) or control (C) treatment conditions. HG consumed a high glucose drink (2 g glucose/kg body weight) while controls consumed an isocaloric nutrition bar (40% protein, 30% fat, and 30% carbohydrate)...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28493406/beta-hydroxy-beta-methylbutyrate-supplementation-and-skeletal-muscle-in-healthy-and-muscle-wasting-conditions
#16
REVIEW
Milan Holeček
Beta-hydroxy-beta-methylbutyrate (HMB) is a metabolite of the essential amino acid leucine that has been reported to have anabolic effects on protein metabolism. The aims of this article were to summarize the results of studies of the effects of HMB on skeletal muscle and to examine the evidence for the rationale to use HMB as a nutritional supplement to exert beneficial effects on muscle mass and function in various conditions of health and disease. The data presented here indicate that the beneficial effects of HMB have been well characterized in strength-power and endurance exercise...
May 10, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/28485189/the-effects-of-sleep-deprivation-on-soccer-skills
#17
Ståle Pallesen, Hilde Stokvold Gundersen, Morten Kristoffersen, Bjørn Bjorvatn, Eirunn Thun, Anette Harris
Many athletes sleep poorly due to stress, travel, and competition anxiety. In the present study, we investigated the effects of sleep deprivation on soccer skills (juggling, dribbling, ball control, continuous kicking, 20 and 40 m sprint, and 30 m sprint with changes of direction). In all, 19 male junior soccer players (14-19 years old) were recruited and participated in a cross-balanced experimental study comprising two conditions; habitual sleep and 24 hours sleep deprivation. In both conditions, testing took place between 8 a...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28475420/the-impact-of-previous-athletic-experience-on-current-physical-fitness-in-former-collegiate-athletes-and-noncollegiate-athletes
#18
Janet E Simon, Carrie L Docherty
BACKGROUND: Physical activity performed at moderate intensity is associated with reduced risk of mortality, cardiovascular disease, hypertension, and some types of cancers. However, vigorous physical activity during participation in college athletics may increase the risk of injury, which might limit future physical activity levels. PURPOSE: To evaluate differences in current physical fitness levels between former Division I athletes and noncollegiate athletes. STUDY DESIGN: Cross-sectional study...
May 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28453415/connecting-the-libraries-and-athletics-through-instruction-and-outreach
#19
Lara Sapp, K T L Vaughan
This column describes the approaches taken by librarians and staff at James Madison University (JMU) Libraries & Educational Technologies (LET) to extend library support to university athletics. The model resembles that used for outreach to academic programs and was first adapted to the semi-clinical, nonacademic Strength & Conditioning Department, then to JMU Athletics as a whole. Librarians offered targeted instructional sessions, orientations, and asynchronous learning modules embedded in the learning management system...
April 2017: Medical Reference Services Quarterly
https://www.readbyqxmd.com/read/28417093/instability-resistance-training-for-health-and-performance
#20
REVIEW
Erika Zemková
Recently, resistance exercises performed on an unstable surface have become part of athletic training and rehabilitation. Accordingly, their role in performance and health-oriented strength training has increasingly emerged as a matter of interest to researchers and conditioning specialists. A more pronounced activation of stabilizing muscles is assumed to be the main feature of instability resistance exercises. This assumption has been proven by EMG studies, which have highlighted significantly greater electromyographic activity of trunk-stabilizing muscles during exercises under unstable as compared to stable conditions...
April 2017: Journal of Traditional and Complementary Medicine
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