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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/28640774/the-difference-between-countermovement-and-squat-jump-performances-a-review-of-underlying-mechanisms-with-practical-applications
#2
Bas Van Hooren, Julia Zolotarjova
Van Hooren, B and Zolotarjova, J. The difference between countermovement and squat jump performances: a review of underlying mechanisms with practical applications. J Strength Cond Res 31(7): 2011-2020, 2017-Two movements that are widely used to monitor athletic performance are the countermovement jump (CMJ) and squat jump (SJ). Countermovement jump performance is almost always better than SJ performance, and the difference in performance is thought to reflect an effective utilization of the stretch-shortening cycle...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28640773/salivary-mitochondrial-dna-copy-number-is-associated-with-exercise-ventilatory-efficiency
#3
Yang Chen, Helene Z Hill, Gudrun Lange, Michael J Falvo
Chen, Y, Hill, HZ, Lange, G, and Falvo, MJ. Salivary mitochondrial DNA copy number is associated with exercise ventilatory efficiency. J Strength Cond Res 31(7): 2000-2004, 2017-Mitochondrial DNA copy number (mtDNAcn) is an index of mitochondrial content and is responsive to changes in exercise training volume. Therefore, assessment of mtDNAcn may help to optimize exercise prescription and aid in athlete monitoring. Although previous work has assessed mtDNAcn derived from skeletal muscle and blood using invasive approaches, no study has examined salivary mtDNAcn and its relationship with sport performance...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28639445/periodized-training-archive-better-autonomic-modulation-and-aerobic-performance-than-non-periodized-training
#4
Vicente J Clemente-Suarez
BACKGROUND: The aim of the present research was to analyze autonomic response and aerobic performance after performing three different workloads training distributions. METHODS: Thirty athletes (38.7±9.8 years. 174.7±6.5 cm. 72.0±9.8 kg) were randomly divided in 3 groups of 10 participants each one to perform 3 different 4-week training programs: PRO group: increasing the aerobic training intensity during the 4-weeks; UNI group: performing a uniform aerobic intensity every week; and FRE group performing a free training...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639443/relationship-between-the-handball-specific-complex-test-nonspecific-field-tests-and-the-match-performance-score-in-elite-professional-handball-players
#5
Souhail Hermassi, Mohamed S Chelly, Rainer Wollny, Birgit Hoffmeyer, Georg Fieseler, Stephan Schulze, Lars Irlenbusch, Karl-Stefan Delank, Roy J Shephard, Thomas Bartels, René Schwesig
BACKGROUND: This study assessed the validity of the handball-specific complex-test (HBCT) and two nonspecific field tests in professional elite handball athletes, using the match performance score (MPS) as the gold standard of performance. METHODS: Thirteen elite male handball players (age: 27.4 ± 4.8 years; premier German league) performed the HBCT, the Yo-Yo Intermittent Recovery Test (Yo-Yo-IR1-test) and a repeated shuttle sprint ability (RSA) test at the beginning of pre-season training...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639442/weightbearing-ankle-dorsiflexion-range-of-motion-and-sagittal-plane-kinematics-during-single-leg-drop-jump-landing-in-healthy-male-athletes
#6
Brittany Dowling, April L McPherson, James M Paci
BACKGROUND: Passive ankle dorsiflexion range of motion (DROM) measures have been identified as a risk factor for injury during landings. However, passive measurements might not be indicative of dynamic ankle movement, whereas a weightbearing ROM might be a better tool when evaluating movement. The purpose of this study was to investigate the relationship between weightbearing DROM and sagittal plane landing mechanics in a single leg drop jump task. METHODS: 73 male athletes (22...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639438/body-composition-analysis-to-study-long-term-training-effects-in-elite-male-water-polo-athletes
#7
Giovanni Melchiorri, Valerio Viero, Roberto Sorge, Tamara Triossi, Alessandro Campagna, Stella L Volpe, Dalgisio Lecis, Virginia Tancredi, Angela Andreoli
BACKGROUND: Elite water polo athletes undergo heavy training programs throughout the year, but especially to prepare major competitions, such as the Olympics. Optimal athletic performance is a result of many factors, including proper management of the intensity and volume of training, nutrition and recovery between training sessions. When training is excessive in relation to recovery may occur non functional overreaching (NFO). NFO can degenerate into overtraining syndrome (OTS) resulting in a decrease in athletic performance, with likely changes in body weight and body composition...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28632062/skeleton-sled-velocity-profiles-a-novel-approach-to-understand-critical-aspects-of-the-elite-athletes-start-phases
#8
Steffi L Colyer, Keith A Stokes, James L J Bilzon, Aki I T Salo
The development of velocity across the skeleton start is critical to performance, yet poorly understood. We aimed to understand which components of the sled velocity profile determine performance and how physical abilities influence these components. Thirteen well-trained skeleton athletes (>85% of athletes in the country) performed dry-land push-starts alongside countermovement jump and sprint tests at multiple time-points. A magnet encoder attached to the sled wheel provided velocity profiles, which were characterised using novel performance descriptors...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28630581/5000-meter-run-performance-is-not-enhanced-24-hrs-after-an-intense-exercise-bout-and-cold-water-immersion
#9
Mary C Stenson, Matthew R Stenson, Tracey D Matthews, Vincent J Paolone
Cold water immersion (CWI) is used by endurance athletes to speed recovery between exercise bouts, but little evidence is available on the effects of CWI on subsequent endurance performance. The purpose of this study was to investigate the effects of CWI following an acute bout of interval training on 5000 m run performance 24 hrs after interval training, perceived muscle soreness (PMS), range of motion (ROM), thigh circumference (TC), and perceived exertion (RPE). Nine endurance-trained males completed 2 trials, each consisting of an interval training session of 8 repetitions of 1200 m at a running pace equal to 75% of VO2peak, either a control or CWI treatment, and a timed 5000 m run 24 hrs post interval training session...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#10
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28628968/performance-trends-in-age-group-triathletes-in-the-olympic-distance-triathlon-at-the-world-championships-2009-2014
#11
Martin Wonerow, Christoph Alexander Rüst, Pantelis Theodoros Nikolaidis, Thomas Rosemann, Beat Knechtle
Performance trends in elite triathletes competing in age group classes have been investigated for Ironman triathlon in ‘Ironman Hawaii’ but not for short distance triathletes competing at international level in event such as the Olympic distance triathlon at the World Championships. The aim of the present study was to evaluate participation and performance trends of age group triathletes competing in the Olympic distance triathlon at the ITU (International Triathlon Union) World Championships 2009-2014...
June 30, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28628396/differential-in-maximal-aerobic-capacity-by-sex-in-collegiate-endurance-athletes-consuming-a-marginally-low-carbohydrate-diet
#12
Marissa N Baranauskas, Brian Miller, Jordan T Olson, Michelle Boltz, Laura Richardson, Matthew Juravich, Ronald Otterstetter
PURPOSE: Although current sports nutrition recommendations advocate for a high carbohydrate (CHO) intake among endurance athletes, recent research has suggested that training with low CHO availability may augment adaptations to aerobic training. The purpose of this study was to observe the dietary habits of collegiate distance runners and to investigate the effects of habitual CHO intake on aerobic performance [VO2max(post)] during a competitive season. METHODS: During an 8-week trial period, 12 (N = 12) collegiate track athletes recorded their self-selected dietary intake via 24-hour recall...
June 19, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28626339/effects-of-2-week-intermittent-training-in-hypobaric-hypoxia-on-the-aerobic-energy-metabolism-and-performance-of-cycling-athletes-with-disabilities
#13
Sang-Hoon Kim, Ho-Jung An, Jung-Hyun Choi, Yong-Youn Kim
[Purpose] The present study aimed at examining changes in aerobic energy metabolism and performance in cycling athletes after 2 weeks of intermittent training in a multistep hypobaric hypoxia environment. [Subjects and Methods] We also aimed at using the findings to propose an efficient training program in hypobaric hypoxia for endurance athletes with disabilities. The study participants were three cycling athletes with physical disabilities from the Korean national team (A, B, and C athletes). They underwent complex (repetition, interval, and continued) training with a roller-type cycle in a multistep hypobaric hypoxia environment (simulated altitude, 4,000 m above sea level)...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28622081/effects-of-inspiratory-muscle-training-in-professional-women-football-players-a-randomized-sham-controlled-trial
#14
Bruno Archiza, Daniela Kuguimoto Andaku, Flávia Cristina Rossi Caruso, José Carlos Bonjorno, Cláudio Ricardo de Oliveira, Paula Angélica Ricci, André Capaldo do Amaral, Stela Márcia Mattiello, Cleiton Augusto Libardi, Shane A Phillips, Ross Arena, Audrey Borghi-Silva
This study was conducted to determine the effects of inspiratory muscle training (IMT) on respiratory and peripheral muscles oxygenation during a maximal exercise tolerance test and on repeated-sprint ability (RSA) performance in professional women football players. Eighteen athletes were randomly assigned to one of the following groups: SHAM (n = 8) or IMT (n = 10). After a maximal incremental exercise test, all participants performed (on a different day) a time-to-exhaustion (Tlim) test. Peripheral and respiratory muscles oxygenation by near-infrared spectroscopy, breath-by-breath ventilatory and metabolic variables, and blood lactate concentration were measured...
June 16, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28615997/serum-concentration-of-several-trace-metals-and-physical-training
#15
Marcos Maynar, Francisco Llerena, Francisco J Grijota, Javier Alves, María C Robles, Ignacio Bartolomé, Diego Muñoz
BACKGROUND: The aim of this study was to observe the concentrations of trace metals boron, lithium, rubidium, antimony, tin and strontium in the serum of athletes from different modalities and sedentary subjects and the possible influence that different energy sports training modalities can have on their concentration. METHODS: Eighty professional athletes and 31 sedentary males participated in the present survey. All of them were living in Cáceres (Spain). Serum boron, lithium, rubidium, antimony, tin and strontium analysis was performed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28615996/international-society-of-sports-nutrition-position-stand-safety-and-efficacy-of-creatine-supplementation-in-exercise-sport-and-medicine
#16
REVIEW
Richard B Kreider, Douglas S Kalman, Jose Antonio, Tim N Ziegenfuss, Robert Wildman, Rick Collins, Darren G Candow, Susan M Kleiner, Anthony L Almada, Hector L Lopez
Creatine is one of the most popular nutritional ergogenic aids for athletes. Studies have consistently shown that creatine supplementation increases intramuscular creatine concentrations which may help explain the observed improvements in high intensity exercise performance leading to greater training adaptations. In addition to athletic and exercise improvement, research has shown that creatine supplementation may enhance post-exercise recovery, injury prevention, thermoregulation, rehabilitation, and concussion and/or spinal cord neuroprotection...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28615216/emergency-response-facilities-including-primary-and-secondary-prevention-strategies-across-79-professional-football-clubs-in-england
#17
Aneil Malhotra, Harshil Dhutia, Sabiha Gati, Tee-Joo Yeo, Gherardo Finnochiaro, Tracey Keteepe-Arachi, Thomas Richards, Mike Walker, Robin Birt, David Stuckey, Laurence Robinson, Maite Tome, Ian Beasley, Michael Papadakis, Sanjay Sharma
AIM: To assess the emergency response planning and prevention strategies for sudden cardiac arrest (SCA) across a wide range of professional football clubs in England. METHODS: A written survey was sent to all professional clubs in the English football league, namely the Premiership, Championship, League 1 and League 2. Outcomes included: (1) number of clubs performing cardiac screening and frequency of screening; (2) emergency planning and documentation; (3) automated external defibrillator (AED) training and availability; and (4) provision of emergency services at sporting venues...
June 14, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28613960/the-effect-of-air-pollution-on-diurnal-variation-of-performance-in-anaerobic-tests-cardiovascular-and-hematological-parameters-and-blood-gases-on-soccer-players-following-the-yo-yo-intermittent-recovery-test-level-1
#18
Nesrin Boussetta, Salma Abedelmalek, Khouloud Aloui, Nizar Souissi
This study aimed to investigate the effect of air pollution on diurnal variation of performance in anaerobic tests, cardiovascular and hematological parameters, and blood gases on soccer players following the Yo-Yo Intermittent Recovery Test Level-1 (YYIRT1). In a randomized order, 11 healthy soccer players (mean age: 21.8 [range: 20-24] years; height: 178.00 [range: 1.64-1.83] cm; body mass index [BMI]: 23.57 [range: 20.45-28.03] kg.m(-2)) performed a YYIRT1 at two different times of day (TOD) (08:00 h and 18:00 h) in two areas (i...
June 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28612890/technology-in-rehabilitation-comparing-personalised-and-global-classification-methodologies-in-evaluating-the-squat-exercise-with-wearable-imus
#19
Martin A O'Reilly, Darragh Whelan, Tomás E Ward, Eamonn Delahunt, Brian Caulfield
BACKGROUND: The barbell squat is a popularly used lower limb rehabilitation exercise. It is also an integral exercise in injury risk screening protocols. To date athlete/patient technique has been assessed using expensive laboratory equipment or subjective clinical judgement; both of which are not without shortcomings. Inertial measurement units (IMUs) may offer a low cost solution for the objective evaluation of athlete/patient technique. However, it is not yet known if global classification techniques are effective in identifying naturally occurring, minor deviations in barbell squat technique...
June 14, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28611674/is-marathon-training-harder-than-the-ironman-training-an-eco-method-comparison
#20
Jonathan Esteve-Lanao, Diego Moreno-Pérez, Claudia A Cardona, Eneko Larumbe-Zabala, Iker Muñoz, Sergio Sellés, Roberto Cejuela
Purpose: To compare the absolute and relative training load of the Marathon (42k) and the Ironman (IM) training in recreational trained athletes. Methods: Fifteen Marathoners and Fifteen Triathletes participated in the study. Their performance level was the same relative to the sex's absolute winner at the race. No differences were presented neither in age, nor in body weight, height, BMI, running VO2max max, or endurance training experience (p > 0.05). They all trained systematically for their respective event (IM or 42k)...
2017: Frontiers in Physiology
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