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https://www.readbyqxmd.com/read/28632046/targeting-associated-mechanisms-of-anterior-cruciate-ligament-injury-in-female-community-level-athletes
#1
Jonathan M D Staynor, Joanna C Nicholas, Gillian Weir, Jacqueline A Alderson, Cyril J Donnelly
This study aims to determine if biomechanically informed injury prevention training can reduce associated factors of anterior cruciate ligament injury risk among a general female athletic population. Female community-level team sport athletes, split into intervention (n = 8) and comparison groups (n = 10), completed a sidestepping movement assessment prior to and following a 9-week training period, in which kinetic, kinematic and neuromuscular data were collected. The intervention group completed a biomechanically informed training protocol, consisting of plyometric, resistance and balance exercises, adjunct to normal training, for 15-20 min twice a week...
February 24, 2017: Sports Biomechanics
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/28605235/effects-of-hip-strengthening-on-neuromuscular-control-hip-strength-and-self-reported-functional-deficits-in-individuals-with-chronic-ankle-instability
#3
Brent I Smith, Carrie L Docherty, Denice Curtis
CONTEXT: Deficits in ankle and hip strength and lower extremity postural control are associated with chronic ankle instability (CAI). Following strength training, muscle groups demonstrate increased strength. This change is partially credited to improved neuromuscular control and many studies have investigated ankle protocols for subjects with CAI. The effects of isolating hip musculature in strength training protocols in this population is not well understood. OBJECTIVE: Examine the effects of hip strengthening on clinical and self-reported outcomes in patients with CAI...
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/28591135/bioelectrical-impedance-vector-analysis-biva-for-measuring-the-hydration-status-in-young-elite-synchronized-swimmers
#5
Marta Carrasco-Marginet, Jorge Castizo-Olier, Lara Rodríguez-Zamora, Xavier Iglesias, Ferran A Rodríguez, Diego Chaverri, Daniel Brotons, Alfredo Irurtia
PURPOSE: The assessment of body hydration is a complex process, and no measurement is valid for all situations. Bioelectrical impedance vector analysis (BIVA) has emerged as a relatively novel technique for assessing hydration status in sports. We applied BIVA a) to determine hydration changes evoked by an intense synchronized swimming (SS) training session; b) to characterize the sample of young elite swimmers in relation with a nonathletic reference population; and c) to generate its 50%, 75% and 95% percentiles of the bioelectrical variables...
2017: PloS One
https://www.readbyqxmd.com/read/28554316/beta-hydroxy-beta-methyl-butyrate-hmb-from-experimental-data-to-clinical-evidence-in-sarcopenia
#6
Alfonso J Cruz-Jentoft
β-hydroxy-β-methylbutyrate (HMB) is a metabolite derived from leucine and its ketoacid alpha-ketoisocaproate. Leucine has a role in regulating protein synthesis in muscle cells, and HMB seems to be a key active metabolite in such regulation. HMB has been shown to modulate muscle protein degradation by inhibiting the ubiquitin-proteasome proteolytic pathway, to up-regulate protein synthesis via the mTOR pathway, and to stabilize cell membranes via the rate limiting enzyme to cholesterol synthesis HMG- coenzyme A reductase...
May 28, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28538317/effects-of-inertial-setting-on-power-force-work-and-eccentric-overload-during-flywheel-resistance-exercise-in-women-and-men
#7
Luis M Martinez-Aranda, Rodrigo Fernandez-Gonzalo
Exercise load is a key component in determining end-point adaptations to resistance exercise. Yet, there is no information regarding the use of different inertia (i.e., loads) during isoinertial flywheel resistance exercise, a very popular high-intensity training model. Thus, this study examined power, work, force, and eccentric overload produced during flywheel resistance exercise with different inertial settings in men and women. Twenty-two women (n = 11) and men (n = 11) performed unilateral (in both legs) isolated concentric (CON) and coupled CON and eccentric (ECC) exercise in a flywheel knee extension device employing 6 inertias (0...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538309/relative-load-prediction-by-velocity-and-the-omni-res-0-10-scale-in-parallel-squat
#8
Fernando Naclerio, Eneko Larumbe-Zabala
Naclerio, F and Larumbe-Zabala, E. Relative load prediction by velocity and the OMNI-RES 0-10 scale in parallel squat. J Strength Cond Res 31(6): 1585-1591, 2017-This study analyzed the possibility of using movement velocity and the rate of perceived exertion as predictors of relative load in the parallel squat (PSQ) exercise. To determine the full load-velocity and load-rate of perceived exertion relationships, 290 young, resistance-trained athletes (209 males and 81 females) performed a progressive strength test up to the 1 repetition maximum...
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
#9
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
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. Thus, the purpose of this study was to compare the effects of different combinations of ST and PT sequences on strength, jump, speed, and agility capacities of elite young soccer players...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28533074/exercise-science-principles-and-the-vocal-warm-up-implications-for-singing-voice-pedagogy
#10
Matthew Hoch, Mary J Sandage
OBJECTIVES/HYPOTHESES: Principles from exercise science literature were applied to singing warm-up pedagogy as a method for examining parallels between athletic and voice training. Analysis of the use of exercise principles in vocal warm-up should illuminate aspects of voice training that may be further developed in the future. METHODS/DESIGN: A selected canon of standard voice pedagogy texts and well-regarded warm-up methods were evaluated for use of exercise science principles for skill acquisition and fatigue resistance...
May 19, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28497283/the-impact-of-resistance-training-on-swimming-performance-a-systematic-review
#11
REVIEW
Emmet Crowley, Andrew J Harrison, Mark Lyons
BACKGROUND: The majority of propulsive forces in swimming are produced from the upper body, with strong correlations between upper body strength and sprint performance. There are significant gaps in the literature relating to the impact of resistance training on swimming performance, specifically the transfer to swimming performance. OBJECTIVE: The aims of this systematic literature review are to (1) explore the transfer of resistance-training modalities to swimming performance, and (2) examine the effects of resistance training on technical aspects of swimming...
May 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28493406/beta-hydroxy-beta-methylbutyrate-supplementation-and-skeletal-muscle-in-healthy-and-muscle-wasting-conditions
#12
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/28490543/molecular-regulation-of-exercise-induced-muscle-fiber-hypertrophy
#13
Marcas M Bamman, Brandon M Roberts, Gregory R Adams
Skeletal muscle hypertrophy is a widely sought exercise adaptation to counteract the muscle atrophy of aging and disease, or to improve athletic performance. While this desired muscle enlargement is a well-known adaptation to resistance exercise training (RT), the mechanistic underpinnings are not fully understood. The purpose of this review is thus to provide the reader with a summary of recent advances in molecular mechanisms-based on the most current literature-that are thought to promote RT-induced muscle hypertrophy...
May 10, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28469755/can-different-complex-training-improve-the-individual-phenomenon-of-post-activation-potentiation
#14
Zong-Rong Chen, Shin-Liang Lo, Min-Hsien Wang, Ching-Fang Yu, Hsien-Te Peng
The aims of the present study were (a) to determine whether the two types of complex training and vibration complex training would improve the individual phenomenon of post-activation potentiation (PAP) for every athlete in a team setting; and (b) to compare the acute effect of resistance and plyometric exercise, whole body vibration, complex training and vibration complex training on vertical jump performance. The participants were ten male division I college volleyball and basketball players. They were asked to perform three vertical jumps as a pre-test and were then randomly assigned to one of five PAP protocols, resistance exercise using half squat exercise, plyometric exercise using drop jumps with individualized drop height, whole body vibration using squats on a vibration plate, complex training combining resistance exercise with plyometric exercise, vibration complex training combining whole body vibration with plyometric exercise...
February 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28459794/effectiveness-of-a-16-week-high-intensity-cardio-resistance-training-hicrt-program-in-adults
#15
Tina A Greenlee, Daniel R Greene, Nathan J Ward, Ginger E Reeser, Courtney M Allen, Nicholas W Baumgartner, Neal J Cohen, Arthur F Kramer, Charles H Hillman, Aron K Barbey
The purpose of this study was to determine the efficacy of a novel, 16-week High-Intensity Cardio-Resistance Training (HICRT) program on measures of aerobic fitness, agility, aerobic power, muscular endurance, lower body explosive power, and self-reported activity level. The intervention group (N=129; 63 f, 24.65±5.55 y) had a baseline VO2max of 39.83±9.13. These individuals participated in 26, 70-minute exercise sessions, and 4 fitness testing sessions. Participants were matched with a non-exercise control group, paired by sex, age, and baseline VO2max...
April 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28459286/the-maximally-achievable-cycling-cadence-affects-carbohydrate-management-at-moderate-and-heavy-exercise-intensity
#16
Ralph Beneke, Tobias G J Weber, Renate M Leithäuser
Effects of different cycling cadences (RPM) on metabolic rate, blood lactate concentration (BLC), and reliance on carbohydrate (CHO) defined as the fraction of oxygen uptake used for CHO oxidation (relCHO) are highly individual. Whether this depends on the individually maximal achievable RPM obtained at minimized cycling resistance (RPMmax), is unknown. We tested the hypotheses that 1) the individual freely chosen RPM at an incremental cycle ergometer test (ILT), and 2) relCHO at given BLC levels both depend on RPMmax...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28447880/resistance-training-in-youth-laying-the-foundation-for-injury-prevention-and-physical-literacy
#17
Christin Zwolski, Catherine Quatman-Yates, Mark V Paterno
CONTEXT: The rising incidence of physical activity- and sports-related injuries has prompted the present-day investigation of resistance training as a potential means of injury prevention and physical literacy development among youth. EVIDENCE ACQUISITION: Relevant studies on the topics of athlete development, physical literacy, resistance training, and injury prevention in children and adolescents were reviewed (PubMed and Sports Discus, 1982-2016). Recommendations from consensus guidelines and position statements applicable to resistance training and injury prevention in youth, in addition to young athlete development, were reviewed...
April 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28431408/the-effects-of-exercise-modality-during-additional-high-intensity-interval-training-upon-aerobic-fitness-and-strength-in-powerlifting-and-strongman-athletes
#18
Patroklos Androulakis-Korakakis, Louis Langdown, Adam Lewis, James Fisher, Paulo Gentil, Antonio Paoli, James Steele
Powerlifters and strongman athletes have a necessity for optimal levels of muscular strength whilst maintaining sufficient aerobic capacity to perform and recover between events. HIIT has been popularized for its efficacy in improving both aerobic fitness and strength but never assessed within the aforementioned population group. The present study looked to compare the effect of exercise modality, e.g. a traditional aerobic mode (AM), and strength mode, (SM), during HIIT upon aerobic fitness and strength. Sixteen well resistance trained male participants, currently competing in powerlifting and strongman events, completed 8 weeks of approximately effort- and volume-matched HIIT in 2 groups: AM (cycling, n=8) and SM (resistance training, n=8)...
April 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28426514/comparison-of-the-hang-high-pull-and-loaded-jump-squat-for-the-development-of-vertical-jump-and-isometric-force-time-characteristics
#19
Dustin J Oranchuk, Tracey L Robinson, Zachary J Switaj, Eric J Drinkwater
Weightlifting movements have high skill demands and require expert coaching. Loaded jumps have a comparably lower skill demand, but may be similarly effective for improving explosive performance. The purpose of this study was to compare vertical jump performance, isometric force, and rate of force development (RFD) following a ten-week intervention employing the hang high-pull (hang-pull) or trap-bar jump squat (jump-squat). Eighteen NCAA Division II swimmers (8 males, 10 females) with at least one year of resistance training experience volunteered to participate...
April 15, 2017: Journal of Strength and Conditioning Research
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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