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Strength and conditioning training

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https://www.readbyqxmd.com/read/28538326/technology-in-strength-and-conditioning-tracking-lower-limb-exercises-with-wearable-sensors
#1
Martin A OʼReilly, Darragh F Whelan, Tomas E Ward, Eamonn Delahunt, Brian Caulfield
O'Reilly, MA, Whelan, DF, Ward, TE, Delahunt, E, and Caulfield, B. Technology in strength and conditioning tracking lower-limb exercises with wearable sensors. J Strength Cond Res 31(6): 1726-1736, 2017-Strength and conditioning (S&C) coaches offer expert guidance to help those they work with achieve their personal fitness goals. However, because of cost and availability issues, individuals are often left training without expert supervision. Recent developments in inertial measurement units (IMUs) and mobile computing platforms have allowed for the possibility of unobtrusive motion tracking systems and the provision of real-time individualized feedback regarding exercise performance...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538321/muscle-activation-differs-between-partial-and-full-back-squat-exercise-with-external-load-equated
#2
Josinaldo J da Silva, Brad J Schoenfeld, Priscyla N Marchetti, Silvio L Pecoraro, Julia M D Greve, Paulo H Marchetti
da Silva, JJ, Schoenfeld, BJ, Marchetti, PN, Pecoraro, SL, Greve, JMD, and Marchetti, PH. Muscle activation differs between partial and full back squat exercise with external load equated. J Strength Cond Res 31(6): 1688-1693, 2017-Changes in range of motion affect the magnitude of the load during the squat exercise and, consequently, may influence muscle activation. The purpose of this study was to evaluate muscle activation between the partial and full back squat exercise with external load equated on a relative basis between conditions...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538320/the-effects-of-a-heel-wedge-on-hip-pelvis-and-trunk-biomechanics-during-squatting-in-resistance-trained-individuals
#3
Jesse M Charlton, Connor A Hammond, Christopher K Cochrane, Gillian L Hatfield, Michael A Hunt
Charlton, JM, Hammond, CA, Cochrane, CK, Hatfield, GL, and Hunt, MA. The effects of a heel wedge on hip, pelvis, and trunk biomechanics during squatting in resistance trained individuals. J Strength Cond Res 31(6): 1678-1687, 2017-Barbell back squats are a popular exercise for developing lower extremity strength and power. However, this exercise has potential injury risks, particularly to the lumbar spine, pelvis, and hip joint. Previous literature suggests heel wedges as a means of favorably adjusting trunk and pelvis kinematics with the intention of reducing such injury risks...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538319/reliability-and-accuracy-of-a-standardized-shallow-water-running-test-to-determine-cardiorespiratory-fitness
#4
Elizabeth F Nagle, Mary E Sanders, Bethany B Gibbs, Barry A Franklin, Jacquelyn A Nagle, Philip J Prins, Caleb D Johnson, Robert J Robertson
Nagle, EF, Sanders, ME, Gibbs, BB, Franklin, BA, Nagle, JA, Prins, PJ, Johnson, CD, and Robertson, RJ. Reliability and accuracy of a standardized shallow water running test to determine cardiorespiratory fitness. J Strength Cond Res 31(6): 1669-1677, 2017-A standardized fitness assessment is critical for the development of an individualized exercise prescription. Although the benefits of aquatic exercise have been well established, there remains the need for a standardized nonswimming protocol to accurately assess cardiorespiratory fitness (CRF) in shallow water...
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
#5
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
#6
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/28538307/can-cold-water-immersion-enhance-recovery-in-elite-olympic-weightlifters-an-individualized-perspective
#7
Jan Schimpchen, Maximilian Wagner, Alexander Ferrauti, Michael Kellmann, Mark Pfeiffer, Tim Meyer
Schimpchen, J, Wagner, M, Ferrauti, A, Kellmann, M, Pfeiffer, M, and Meyer, T. Can cold water immersion enhance recovery in elite Olympic weightlifters? An individualized perspective. J Strength Cond Res 31(6): 1569-1576, 2017-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...
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
#8
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/28538298/quantifying-the-high-speed-running-and-sprinting-profiles-of-elite-female-soccer-players-during-competitive-matches-using-an-optical-player-tracking-system
#9
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
Mara, JK, Thompson, KG, Pumpa, KL, and Morgan, S. Quantifying the high-speed running and sprinting profiles of elite female soccer players during competitive matches using an optical player tracking system. J Strength Cond Res 31(6): 1500-1508, 2017-The aim of this study was to determine the high-speed running and sprinting profiles of elite female soccer players during competitive matches using a new Optical Player Tracking system. Eight stationary video cameras were positioned at vantage points surrounding the soccer field so that when each camera view was combined, the entire field could be viewed simultaneously...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538296/exercise-intensity-and-technical-demands-of-small-sided-soccer-games-for-under-12-and-under-14-players-effect-of-area-per-player
#10
Domenico Martone, Moreno Giacobbe, Adriano Capobianco, Esther Imperlini, Annamaria Mancini, Mario Capasso, Pasqualina Buono, Stefania Orrù
Martone, D, Giacobbe, M, Capobianco, A, Imperlini, E, Mancini, A, Capasso, M, Buono, P, and Orrù, S. Exercise intensity and technical demands of small-sided soccer games for under-12 and under-14 players: Effect of area per player. J Strength Cond Res 31(6): 1486-1492, 2017-The aim of this study was to evaluate the effects of 6 different areas per player (AP) on exercise intensity (EI) measured during small-sided games (SSGs) and expressed as percentage of maximal heart rate (%MHR) and technical actions (TAs) involvement with the ball, crosses, headers, tackles, shots on goal, dribbling, passing, and target passing-in U-12 and U-14 soccer players during SSGs...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28532248/effects-of-drop-sets-with-resistance-training-on-increases-in-muscle-csa-strength-and-endurance-a-pilot-study
#11
Hayao Ozaki, Atsushi Kubota, Toshiharu Natsume, Jeremy P Loenneke, Takashi Abe, Shuichi Machida, Hisashi Naito
To investigate the effects of a single high-load (80% of one repetition maximum [1RM]) set with additional drop sets descending to a low-load (30% 1RM) without recovery intervals on muscle strength, endurance, and size in untrained young men. Nine untrained young men performed dumbbell curls to concentric failure 2-3 days per week for 8 weeks. Each arm was randomly assigned to one of the following three conditions: 3 sets of high-load (HL, 80% 1RM) resistance exercise, 3 sets of low-load [LL, 30% 1RM] resistance exercise, and a single high-load (SDS) set with additional drop sets descending to a low-load...
May 22, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28523517/body-size-of-male-youth-soccer-players-1978-2015
#12
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/28511848/intense-resistance-exercise-increases-peripheral-brain-derived-neurotrophic-factor
#13
Kieran J Marston, Michael J Newton, Belinda M Brown, Stephanie R Rainey-Smith, Sabine Bird, Ralph N Martins, Jeremiah J Peiffer
OBJECTIVES: Brain-derived neurotrophic factor (BDNF) has been shown to increase in an intensity dependent manner in response to aerobic exercise. However, previous research investigating the use of resistance exercise to increase BDNF levels has been less conclusive, likely due to the low intensity nature of traditional resistance exercise programs. This study examined the influence of acute resistance exercise to-fatigue on serum BDNF levels and blood lactate. DESIGN: Acute crossover study...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28500415/mind-muscle-connection-training-principle-influence-of-muscle-strength-and-training-experience-during-a-pushing-movement
#14
Joaquin Calatayud, Jonas Vinstrup, Markus D Jakobsen, Emil Sundstrup, Juan Carlos Colado, Lars L Andersen
PURPOSE: To investigate the effect of different attentional focus conditions on muscle activity during the push-up exercise and to assess the possible influence of muscle strength and training experience. METHODS: Eighteen resistance-trained men performed 1RM bench press testing and were familiarized with the procedure during the first session. In the second session, three different conditions were randomly performed: regular push-up and push-up focusing on using the pectoralis major and triceps brachii muscles, respectively...
May 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28493406/beta-hydroxy-beta-methylbutyrate-supplementation-and-skeletal-muscle-in-healthy-and-muscle-wasting-conditions
#15
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/28490537/adaptations-to-endurance-and-strength-training
#16
David C Hughes, Stian Ellefsen, Keith Baar
The capacity for human exercise performance can be enhanced with prolonged exercise training, whether it is endurance- or strength-based. The ability to adapt through exercise training allows individuals to perform at the height of their sporting event and/or maintain peak physical condition throughout the life span. Our continued drive to understand how to prescribe exercise to maximize health and/or performance outcomes means that our knowledge of the adaptations that occur as a result of exercise continues to evolve...
May 10, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28489681/temporal-stress-in-the-operating-room-brain-engagement-promotes-coping-and-disengagement-prompts-choking
#17
Hemel N Modi, Harsimrat Singh, Felipe Orihuela-Espina, Thanos Athanasiou, Francesca Fiorentino, Guang-Zhong Yang, Ara Darzi, Daniel R Leff
OBJECTIVE: To investigate the impact of time pressure (TP) on prefrontal activation and technical performance in surgical residents during a laparoscopic suturing task. BACKGROUND: Neural mechanisms enabling surgeons to maintain performance and cope with operative stressors are unclear. The prefrontal cortex (PFC) is implicated due to its role in attention, concentration, and performance monitoring. METHODS: A total of 33 residents [Postgraduate Year (PGY)1-2 = 15, PGY3-4 = 8, and PGY5 = 10] performed a laparoscopic suturing task under "self-paced" (SP) and "TP" conditions (TP = maximum 2 minutes per knot)...
May 9, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28487648/regional-brain-volumes-moderate-but-do-not-mediate-the-effects-of-group-based-exercise-training-on-reductions-in-loneliness-in-older-adults
#18
Diane K Ehlers, Ana M Daugherty, Agnieszka Z Burzynska, Jason Fanning, Elizabeth A Awick, Laura Chaddock-Heyman, Arthur F Kramer, Edward McAuley
Introduction: Despite the prevalence of and negative health consequences associated with perceived loneliness in older adults, few studies have examined interactions among behavioral, psychosocial, and neural mechanisms. Research suggests that physical activity and improvements in perceived social support and stress are related to reductions in loneliness. Yet, the influence of brain structure on these changes is unknown. The present study examined whether change in regional brain volume mediated the effects of changes in social support and stress on change in perceived loneliness after an exercise intervention...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28481597/housing-first-on-a-large-scale-fidelity-strengths-and-challenges-in-the-va-s-hud-vash-program
#19
Stefan G Kertesz, Erika L Austin, Sally K Holmes, Aerin J DeRussy, Carol Van Deusen Lukas, David E Pollio
Housing First (HF) combines permanent supportive housing and supportive services for homeless individuals and removes traditional treatment-related preconditions for housing entry. There has been little research describing strengths and shortfalls of HF implementation outside of research demonstration projects. The U.S. Department of Veterans Affairs (VA) has transitioned to an HF approach in a supportive housing program serving over 85,000 persons. This offers a naturalistic window to study fidelity when HF is adopted on a large scale...
May 2017: Psychological Services
https://www.readbyqxmd.com/read/28481560/an-examination-of-changes-in-behavioral-control-when-stimuli-with-different-associative-histories-are-conditioned-in-compound
#20
Justine Fam, R Frederick Westbrook, Nathan M Holmes
This series of experiments used rats to examine changes in behavioral control when stimuli with different associative histories are conditioned in compound. The initial experiments used blocking designs. Experiment 1 provided a within-subject demonstration of blocking, and Experiment 2 used the compound test procedure to show that, when a novel stimulus, X, is conditioned in compound with an already conditioned stimulus (CS), A, these audiovisual compound stimulus (AX)+ conditioning trials produce a greater increase in behavioral control for X than A...
May 8, 2017: Journal of Experimental Psychology. Animal Learning and Cognition
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