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https://www.readbyqxmd.com/read/28642676/international-society-of-sports-nutrition-position-stand-protein-and-exercise
#1
REVIEW
Ralf Jäger, Chad M Kerksick, Bill I Campbell, Paul J Cribb, Shawn D Wells, Tim M Skwiat, Martin Purpura, Tim N Ziegenfuss, Arny A Ferrando, Shawn M Arent, Abbie E Smith-Ryan, Jeffrey R Stout, Paul J Arciero, Michael J Ormsbee, Lem W Taylor, Colin D Wilborn, Doug S Kalman, Richard B Kreider, Darryn S Willoughby, Jay R Hoffman, Jamie L Krzykowski, Jose Antonio
The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise.For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1...
2017: Journal of the International Society of Sports Nutrition
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
#2
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/28557857/consumption-of-a-5-mg-melatonin-supplement-does-not-affect-32-2-kilometer-cycling-time-trial-performance
#3
Kyle J Brandenberger, Christopher P Ingalls, Jeffrey C Rupp, J Andrew Doyle
Some studies suggest that exogenous melatonin supplementation may improve athletic performance in hot humid environments because of its precooling effect. However, melatonin is also consumed as a sleep aid for its depressive effects on the central nervous system, which may hinder performance. Therefore, this study was conducted to determine whether consuming a 5 mg supplement of melatonin would affect performance in a laboratory-simulated 32.2 kilometer cycling time trial. The time trial was conducted in a thermoneutral environment to separate CNS depressive effects of the melatonin from the cooling effects...
May 25, 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
#4
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/28507521/prime-time-light-exposures-do-not-seem-to-improve-maximal-physical-performance-in-male-elite-athletes-but-enhance-end-spurt-performance
#5
Raphael Knaier, Juliane Schäfer, Anja Rossmeissl, Christopher Klenk, Henner Hanssen, Christoph Höchsmann, Christian Cajochen, Arno Schmidt-Trucksäss
Many sports competitions take place during television prime time, a time of the day when many athletes have already exceeded their time of peak performance. We assessed the effect of different light exposure modalities on physical performance and melatonin levels in athletes during prime time. Seventy-two young, male elite athletes with a median (interquartile range) age of 23 (21; 29) years and maximum oxygen uptake (VO2max) of 63 (58; 66) ml/kg/min were randomly assigned to three different light exposure groups: bright light (BRIGHT), blue monochromatic light (BLUE), and control light (CONTROL)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28488913/relationship-between-pre-training-subjective-wellness-measures-player-load-and-rating-of-perceived-exertion-training-load-in-american-college-football
#6
Andrew D Govus, Aaron Coutts, Rob Duffield, Andrew Murray, Hugh Fullagar
PURPOSE: The relationship between pre-training subjective wellness, external and internal training load in American College football is unclear. This study examined the relationship between pre-training subjective wellness (sleep quality, muscle soreness, energy, wellness Z score) on 1) player load and 2) session rating of perceived exertion (s-RPE-TL) in American College footballers. METHODS: Subjective wellness (measured using 5-point, Likert scale questionnaires); external load (derived from global position systems [GPS] and accelerometry) and s-RPE-TL were collected during three typical training sessions per week for the second half of an American collegiate football season (eight weeks)...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28479951/acute-effects-of-24-h-sleep-deprivation-on-salivary-cortisol-and-testosterone-concentrations-and-testosterone-to-cortisol-ratio-following-supplementation-with-caffeine-or-placebo
#7
Ciaran Mc Donald, Joss Moore, Alan McIntyre, Kevin Carmody, Bernard Donne
Caffeine has become a popular ergogenic aid amongst athletes and usage to improve athletic performance has been well documented. The effect of caffeine on anabolic and catabolic hormones in a sleep-deprived s tate has had little investigation to date. The purpose of the current study was to investigate the potential of caffeine to offset the effects, if any, of short-term sleep deprivation and exercise on an athlete's testosterone and cortisol concentrations via salivary technique. Eleven competitive male athletes volunteered to be part of this prospective double-blinded study...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28421004/neurosensory-and-cognitive-modifications-in-europe-s-toughest-randoraid-competition-the-transpyr%C3%A3-n%C3%A3-a-extreme-study
#8
Alessandro Tonacci, Simona Mrakic-Sposta, Kristian Ujka, Francesco Sansone, Alice Ferrisi, Guido Giardini, Raffaele Conte, Lorenza Pratali
Introduction: Given the wide proliferation of ultra-long endurance races, it is important to understand the physiological response of the athletes to improve their safety. We evaluated the cognitive and neurosensory effects on ultra-endurance athletes during the Transpyrénéa (866 Km, 65,000 m positive slope), held on the French Pyrenees. Materials and Methods: 40 athletes were enrolled (age 43.8 ± 8.8 years; 36 males). Olfactory and cognitive tests were performed before the race (T0, n = 40), at 166 kms (T1, n = 28), at 418 kms (T2, n = 20), and after the race (T3, 866 kms, n = 13)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28398168/pre-game-perceived-wellness-highly-associates-with-match-running-performances-during-an-international-field-hockey-tournament
#9
Mohammed Ihsan, Frankie Tan, Sofyan Sahrom, Hui Cheng Choo, Michael Chia, Abdul Rashid Aziz
This study examined the associations between pre-game wellness and changes in match running performance normalised to either (i) playing time, (ii) post-match RPE or (iii) both playing time and post-match RPE, over the course of a field hockey tournament. Twelve male hockey players were equipped with global positioning system (GPS) units while competing in an international tournament (six matches over 9 days). The following GPS-derived variables, total distance (TD), low-intensity activity (LIA; <15 km/h), high-intensity running (HIR; >15 km/h), high-intensity accelerations (HIACC; >2 m/s(2)) and decelerations (HIDEC; >-2 m/s(2)) were acquired and normalised to either (i) playing time, (ii) post-match RPE or (iii) both playing time and post-match RPE...
June 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28385561/a-multifactorial-evaluation-of-illness-risk-factors-in-athletes-preparing-for-the-summer-olympic-games
#10
Michael K Drew, Nicole Vlahovich, David Hughes, Renee Appaneal, Kirsten Peterson, Louise Burke, Bronwen Lundy, Mary Toomey, David Watts, Gregory Lovell, Stephan Praet, Shona Halson, Candice Colbey, Silvia Manzanero, Marijke Welvaert, Nic West, David B Pyne, Gordon Waddington
OBJECTIVES: Illness can disrupt training and competition performance of athletes. Few studies have quantified the relative contribution of the known medical, behavioural and lifestyle risk factors. DESIGN: Cross-sectional. METHODS: Olympic athletes from 11 sports (n=221) were invited to complete questionnaires administered nine months before the Rio 2016 Olympic Games. These included the Depression, Anxiety and Stress Questionnaire (DASS-21), Perceived Stress Scale (PSS), Dispositional Resilience Scale (DRS), Recovery-Stress Questionnaire (REST-Q-52 item), Low Energy in Females Questionnaire (LEAF-Q), a modified Personal and Household Hygiene questionnaire, Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index, and custom-made questionnaires on probiotic usage and travel...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28328717/perceived-sleep-quality-mood-states-and-their-relationship-with-performance-among-brazilian-elite-athletes-during-a-competitive-period
#11
Ricardo Brandt, Guilherme G Bevilacqua, Alexandro Andrade
Brandt, R, Bevilacqua, GG, and Andrade, A. Perceived sleep quality, mood states, and their relationship with performance among Brazilian elite athletes during a competitive period. J Strength Cond Res 31(4): 1033-1039, 2017-We described the perceived sleep quality and mood states of elite athletes during a competitive period, and clarified their relationship to athletes' sport performance. Participants were 576 Brazilian elite athletes (404 men and 172 women) of individual and team sports. Mood states were evaluated using the Brunel Mood Scale, whereas perceived sleep quality was evaluated using a single question ("How would you evaluate the quality of your sleep in the last few days?")...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28296943/new-approaches-to-determine-fatigue-in-elite-athletes-during-intensified-training-resting-metabolic-rate-and-pacing-profile
#12
Amy L Woods, Laura A Garvican-Lewis, Bronwen Lundy, Anthony J Rice, Kevin G Thompson
BACKGROUND: Elite rowers complete a high volume of training across a number of modalities to prepare for competition, including periods of intensified load, which may lead to fatigue and short-term performance decrements. As yet, the influence of substantial fatigue on resting metabolic rate (RMR) and exercise regulation (pacing), and their subsequent utility as monitoring parameters, has not been explicitly investigated in elite endurance athletes. METHOD: Ten National-level rowers completed a four-week period of intensified training...
2017: PloS One
https://www.readbyqxmd.com/read/28287684/the-value-of-sleep-on-athletic-performance-injury-and-recovery-in-the-young-athlete
#13
Elizabeth A Copenhaver, Alex B Diamond
Adequate sleep can easily become compromised as student-athletes try to balance the multiple demands on their time. People with sleep deficiency are at increased risk for acute illnesses, traumatic sports injuries, and development of chronic diseases. Training sessions or competitions during extremely early or late hours can interfere with circadian and homeostatic rhythms. Adjusting the training schedule to improve sleep duration has a significantly positive impact on several aspects of athletic performance...
March 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28282750/evening-electronic-device-use-the-effects-on-alertness-sleep-and-next-day-physical-performance-in-athletes
#14
Maddison J Jones, Peter Peeling, Brian Dawson, Shona Halson, Joanna Miller, Ian Dunican, Michael Clarke, Carmel Goodman, Peter Eastwood
The aim of the present study was to investigate the influence of different types of tasks performed with or without an electronic device (tablet) on pre-sleep alertness, subsequent sleep quality and next-day athletic performance. Eight highly trained netball players attended a sleep laboratory for pre-sleep testing, polysomnographic sleep monitoring and next-day physical performance testing on 5 separate occasions (1 familiarisation and 4 experimental sessions). For 2 h prior to bedtime, athletes completed cognitively stimulating tasks (puzzles) or passive tasks (reading) with or without a tablet...
February 14, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28277424/comparing-performance-during-morning-vs-afternoon-training-sessions-in-intercollegiate-basketball-players
#15
Aaron D Heishman, Michael A Curtis, Ethan 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/ultradian rhythms and alterations in sleep patterns can impact training ability. Therefore, the purpose of the present study was to examine the effects of morning vs...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28271579/self-reported-sleep-quantity-quality-and-sleep-hygiene-in-elite-athletes
#16
Melanie Knufinke, Arne Nieuwenhuys, Sabine A E Geurts, Anton M L Coenen, Michiel A J Kompier
Sleep is essential for recovery and performance in elite athletes. While actigraphy-based studies revealed suboptimal sleep in athletes, information on their subjective experience of sleep is scarce. Relatively unexplored is also the extent to which athletes' sleep is adversely affected by environmental conditions and daytime behaviours, that is sleep hygiene. This study aimed to provide insight in sleep quantity, quality and its putative association with sleep hygiene. Participants were 98 elite (youth) athletes competing at the highest (inter-)national level...
March 8, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28190825/excessive-game-playing-is-associated-with-poor-toothbrushing-behavior-among-athletic-children-a-cross-sectional-study-in-miyagi-japan
#17
Masahiro Tsuchiya, Haruki Momma, Takuya Sekiguchi, Kaoru Kuroki, Kenji Kanazawa, Makoto Watanabe, Yoshihiro Hagiwara, Ryoichi Nagatomi
Dental problems among athletes have been cautioned due to negative impacts not only on their oral health but also on athletic performance. Acquirement of appropriate oral health behavior mainly composed of toothbrushing in childhood can be one of the most important strategies for advancing children's athletic possibilities. Although habits of screen viewing, including game playing, and TV viewing have direct impacts on children's health and behavioral development, little is known about the association between these habits and toothbrushing frequency...
February 2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28169152/sleep-patterns-and-match-performance-in-elite-australian-basketball-athletes
#18
Craig Staunton, Brett Gordon, Edhem Custovic, Jonathan Stanger, Michael Kingsley
OBJECTIVES: To assess sleep patterns and associations between sleep and match performance in elite Australian female basketball players. DESIGN: Prospective cohort study. METHODS: Seventeen elite female basketball players were monitored across two consecutive in-season competitions (30 weeks). Total sleep time and sleep efficiency were determined using triaxial accelerometers for Baseline, Pre-match, Match-day and Post-match timings. Match performance was determined using the basketball efficiency statistic (EFF)...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28167303/psychological-and-lifestyle-factors-that-influence-the-serial%C3%A2-reporting-of-postconcussion-like-symptoms-in-a-non-concussed-population
#19
Arun Prasad Balasundaram, Josie Athens, Anthony Gerard Schneiders, Paul McCrory, Stephen John Sullivan
BACKGROUND: Symptoms related to concussion are generally found to be nonspecific in nature, as they are also reported by non-concussed individuals. What is currently not known is whether the symptoms vary over time, and whether they are also influenced by a multitude of factors. OBJECTIVE: The aim of this study was to investigate the potential influence of psychological, lifestyle, and situational factors on the change in postconcussion-like symptoms reported over 7 consecutive days in a cohort of normal individuals...
February 4, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28121796/sil-6r-is-related-to-weekly-training-mileage-and-psychological-well-being-in-athletes
#20
Tom Cullen, Andrew W Thomas, Richard Webb, Thom Phillips, Michael G Hughes
INTRODUCTION: IL-6 has been ascribed both positive and negative roles in the context of exercise and training. The dichotomous nature of IL-6 signalling appears to be determined by the respective concentration of its receptors (both membrane-bound (IL-6R) and soluble (sIL-6R) forms). The purpose of the present study was to investigate the response of sIL-6R to long-term training, and to investigate the relationship between sIL-6R, self-reported measures of wellbeing, and upper respiratory illness symptoms (URS) in highly-trained endurance athletes...
January 24, 2017: Medicine and Science in Sports and Exercise
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