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https://www.readbyqxmd.com/read/28070459/pre-versus-post-exercise-protein-intake-has-similar-effects-on-muscular-adaptations
#1
Brad Jon Schoenfeld, Alan Aragon, Colin Wilborn, Stacie L Urbina, Sara E Hayward, James Krieger
The purpose of this study was to test the anabolic window theory by investigating muscle strength, hypertrophy, and body composition changes in response to an equal dose of protein consumed either immediately pre- versus post-resistance training (RT) in trained men. Subjects were 21 resistance-trained men (>1 year RT experience) recruited from a university population. After baseline testing, participants were randomly assigned to 1 of 2 experimental groups: a group that consumed a supplement containing 25 g protein and 1 g carbohydrate immediately prior to exercise (PRE-SUPP) (n = 9) or a group that consumed the same supplement immediately post-exercise (POST-SUPP) (n = 12)...
2017: PeerJ
https://www.readbyqxmd.com/read/28035999/spectroscopic-studies-on-the-molecular-ageing-of-serum-albumin
#2
Mariola Chudzik, Małgorzata Maciążek-Jurczyk, Bartosz Pawełczak, Anna Sułkowska
Pathological states in the organism, e.g., renal or hepatic diseases, cataract, dysfunction of coronary artery, diabetes mellitus, and also intensive workout, induce the structural modification of proteins called molecular ageing or N-A isomerization. The aim of this study was to analyze the structural changes of serum albumin caused by alkaline ageing using absorption, spectrofluorescence, and circular dichroism spectroscopy. The N-A isomerization generates significant changes in bovine (BSA) and human (HSA) serum albumin subdomains-the greatest changes were observed close to the tryptophanyl (Trp) and tyrosyl (Tyr) residue regions while a smaller change was observed in phenyloalanine (Phe) environment...
December 27, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28028619/effects-of-protein-carbohydrate-supplementation-on-immunity-and-resistance-training-outcomes-a-double-blind-randomized-controlled-clinical-trial
#3
Fernando Naclerio, Eneko Larumbe-Zabala, Nadia Ashrafi, Marco Seijo, Birthe Nielsen, Judith Allgrove, Conrad P Earnest
PURPOSE: To examine the impact of ingesting hydrolyzed beef protein, whey protein, and carbohydrate on resistance training outcomes, body composition, muscle thickness, blood indices of health and salivary human neutrophil peptides (HNP1-3), as reference of humoral immunity followed an 8-week resistance training program in college athletes. METHODS: Twenty-seven recreationally physically active males and females (n = 9 per treatment) were randomly assigned to one of the three groups: hydrolyzed beef protein, whey protein, or non-protein isoenergetic carbohydrate...
December 27, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28017453/risk-factors-for-equine-fractures-in-thoroughbred-flat-racing-in-north-america
#4
Stamatis Panagiotis Georgopoulos, Tim D H Parkin
The aim of this paper is to identify risk factors associated with equine fractures in flat horse racing of Thoroughbreds in North America. Equine fractures were defined as any fracture sustained by a horse during a race. This was a cohort study that made use of all starts from the racecourses reporting injuries. The analysis was based on 2,201,152 racing starts that represent 91% of all official racing starts in the USA and Canada from 1st January 2009-31st December 2014. Approximately 3,990,000 workout starts made by the 230,034 Thoroughbreds that raced during that period were also included in the analysis...
December 12, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28006829/influences-of-interelectrode-distance-and-innervation-zone-on-electromyographic-signals
#5
C M Smith, T J Housh, J M Zuniga, C L Camic, H C Bergstrom, D B Smith, T Herda, J P Weir, E C Hill, N D M Jenkins, R J Schmidt, G Johnson
The purpose of the present study was to examine the effects of electrode placements centered over and offset from the innervation zone (IZ) with different interelectrode distances (IED) on the time and frequency domain parameters of the electromyographic (EMG) signal during a fatiguing submaximal, isometric workout. 11 adults performed an isometric leg extension muscle action at 50% maximal voluntary isometric contraction (MVIC) to exhaustion. Electromyographic amplitude and frequency parameters were determined from electrode placements with different IED centered over, at proximal offset, at distal offset, and away from the IZ at 10, 50, and 100% of the time to exhaustion using an electrode array...
December 22, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28005561/risk-factors-for-collegiate-swimmers-hospitalized-with-exertional-rhabdomyolysis
#6
Margo R Stanfa, Navjeet N Silles, Amanda Cooper, Sara Arena, Kristin Landis-Piwowar, Carrie Aprik, Tamara Hew-Butler
OBJECTIVE: To identify midseason risk factors for symptomatic exertional rhabdomyolysis (sER) in swimmers after a novel upper body workout. DESIGN: Retrospective (1) survey and (2) analyses of observational laboratory data conducted over a 16-week training period, 2 months before sER. SETTING: Midwest University. PARTICIPANTS: Thirty-four collegiate swimmers. INDEPENDENT VARIABLES: (1) Motivation, symptoms, and supplements for survey variables...
January 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/27990227/effects-of-a-pre-workout-energy-drink-supplement-on-upper-body-muscular-endurance-performance
#7
Mitchel A Magrini, Ryan J Colquhoun, J Jay Dawes, Doug B Smith
The use of pre-workout beverages is becoming an increasingly common method of improving performance during exercise in athletic and recreationally active populations. Therefore, the purpose of this study was to investigate the effects of a commercially available energy drink on exercise performance. Thirty-one healthy males (n=23) and females (n=8) participated in this study and were separated into two groups: supplement (SU; n=16) or placebo (PL; n=15). Subjects visited the laboratory on 2 occasions separated by no more than 7 days...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27984843/acute-and-long-term-responses-to-different-rest-intervals-in-low-load-resistance-training
#8
J E Fink, B J Schoenfeld, N Kikuchi, K Nakazato
We investigated the effects of low-load resistance training to failure performed with different rest intervals on acute hormonal responses and long-term muscle and strength gains. In the acute study, 14 participants were assigned to either a short rest (S, 30 s) or long rest (L, 150 s) protocol at 40% one-repetition maximum. Blood samples were taken before and after the workout. Both groups showed significant (p<0.05) increases in growth hormone and insulin-like growth factor 1 immediately post-workout...
December 16, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27939120/aerobic-exercise-as-a-warm-up-for-singing-acoustic-impacts
#9
Monica A McHenry, Joseph Evans
OBJECTIVES: In a previous work, it was found that a 30-minute aerobic workout significantly increased singers' sound pressure level and airflow during voicing, suggesting a shift to flow phonation. This companion study was designed to assess the impact of the same workout on pitch accuracy, vibrato rate, extent and regularity, and the singing power ratio. STUDY DESIGN: This study is a cohort experimental study. METHODS: Twenty-two students in an academic vocal performance program participated...
December 6, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/27857520/secondary-elements-of-blood-ph-variation-can-influence-the-effort-effectiveness-based-on-adaptive-changes-within-a-group-of-elite-athletes
#10
Ştefan Adrian Martin, Valeriu Tomescu, Septimiu Voidăzan
AIM: pH is the direct indicator of the body reaction following the activities performed. Establishing precise correlations between pH and blood biochemical parameters might support the balancing of values during periods of marked physical activity. METHOD: We conducted a case study in a group of elite rowers. Twelve athletes were included in the study. Monitoring was carried out by collecting biological samples several times a day: in the morning, 80 minutes pre-workout, 12 hours after the last physical effort performed, at two different times, 10 days apart...
2016: Clujul Medical (1957)
https://www.readbyqxmd.com/read/27857266/my-personal-journey-with-ovarian-cancer-treatment-caring-and-chemotherapy-tips
#11
Kim A Decker
Six years ago, I was diagnosed with stage IIIA ovarian low malignant cell potential cancer. It was the most shocking situation I have ever experienced. I didn't realize I had any symptoms, except occasional back pain, which I attributed to starting a new workout program. I had scheduled an abdominal computerized tomography (CT) scan for recurrent microscopic hematuria, which my internist wanted to check. I was told I would hear the results in two days. Two hours after my CT scan, while I was eating ice cream and watching television, an on-call genitourinary doctor (who I did not personally know) called to tell me the good news-that I had kidney stones, thus the microscopic hematuria...
December 1, 2016: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/27856715/highlighted-topics-recovery-from-exercise-recovery-responses-of-testosterone-growth-hormone-and-igf-1-after-resistance-exercise
#12
William J Kraemer, Nicholas A Ratamess, Bradley C Nindl
The complexity of the endocrine pathways during recovery related to anabolic function belie an over simplistic approach to its study. This review is to examines the role of resistance exercise (RE) on the recovery responses of three major anabolic hormones testosterone, growth hormone(s) and insulin-like growth factor-I. Each hormone has a complexity related to differential pathways of action as well as interactions with binding proteins and receptor interactions. Testosterone is the primary anabolic hormone and its concentration changes during the recovery period depending upon the up- or down-regulation of the androgen receptor...
November 17, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27849117/metabolic-responses-to-a-loaded-movement-training-workout
#13
Derek N Vandenbrink, Nicholas J Petrella, Eric V Neufeld, Brett A Dolezal, Daniel P Maclennan
BACKGROUND: Few studies have investigated the metabolic demands of functional exercise. We determined the oxygen cost, heart rate (HR) response, and energy expenditure (EE) both during and immediately following a loaded movement training (LMT) workout. METHODS: Ten participants (5 male, age = 23.5 ± 3.7 years, VO2peak = 53.3 ± 6.4 ml∙kg-1∙min- 1) completed baseline resting metabolic rate testing, a maximal oxygen uptake (VO2) test, and a familiarization trial...
November 16, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27824252/elite-female-basketball-players-body-weight-neuromuscular-training-and-performance-on-the-y-balance-test
#14
Roberto Benis, Matteo Bonato, Antonio La Torre
CONTEXT: Neuromuscular training enhances unconscious motor responses by stimulating both the afferent signals and central mechanisms responsible for dynamic joint control. Dynamic joint-control training is a vital component of injury-prevention programs. OBJECTIVE: To investigate the effects of body-weight neuromuscular training on Y-Balance Test (YBT) performance and postural control in female basketball players. DESIGN: Randomized controlled clinical trial...
September 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27821032/small-bowel-capsule-endoscopy-for-the-investigation-of-obscure-gastrointestinal-bleeding-when-we-should-do-it-and-what-should-we-expect
#15
REVIEW
N Viazis, J Anastasiou, D G Karamanolis
Obscure gastrointestinal bleeding is defined as bleeding of unknown origin that persists or recurs (i.e. recurrent or persistent iron deficiency anemia, fecal occult blood test positivity or visible bleeding) after a negative initial workout that necessarily includes gastroscopy and colonoscopy. In clinical practice, small bowel capsule endoscopy is recommended as a third stage examination in these patients, since it is a simple, safe, non-invasive and reliable test. To date there are three available small bowel capsule systems that have gained FDA approval and their diagnostic yield has shown to be superior to other diagnostic modalities for the investigation of the small bowel in patients with obscure gastrointestinal bleeding...
July 2016: Acta Gastro-enterologica Belgica
https://www.readbyqxmd.com/read/27813687/the-effects-of-a-transcontinental-flight-on-markers-of-coagulation-and-fibrinolysis-in-healthy-men-after-vigorous-physical-activity
#16
Brian R Kupchak, William J Kraemer, David R Hooper, Cathy Saenz, Lexie L Dulkis, Paul J Secola, Lee E Brown, Andrew J Galpin, Jared W Coburn, William H DuPont, Lydia K Caldwell, Jeff S Volek, Carl M Maresh
PURPOSE: Athletes and military service members are known to undergo strenuous exercise and sometimes have to take long haul flights soon afterwards; however, its combined effect on many physiological functions is relatively unknown. Therefore, we examined the combined effects of a full-body muscle-damaging workout and transcontinental flight on coagulation and fibrinolysis in healthy, resistance trained men. We also determined the efficacy of a full-body compression garment in limiting their coagulation responses...
November 4, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27789774/post-exercise-muscle-glycogen-resynthesis-in-humans
#17
Louise M Burke, Luc J C van Loon, John A Hawley
Since the pioneering studies conducted in the 1960s in which glycogen status was investigated utilizing the muscle biopsy technique, sports scientists have developed a sophisticated appreciation of the role of glycogen in cellular adaptation and exercise performance, as well as sites of storage of this important metabolic fuel. While sports nutrition guidelines have evolved during the past decade to incorporate sport-specific and periodized manipulation of carbohydrate (CHO) availability, athletes attempt to maximise muscle glycogen synthesis between important workouts or competitive events so that fuel stores closely match to the demands of the prescribed exercise...
October 27, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27787464/the-effects-of-eccentric-contraction-duration-on-muscle-strength-power-production-vertical-jump-and-soreness
#18
Jonathan Mike, Nathan Cole, Chris Herrera, Trisha McLain, Len Kravitz, Chad Kerksick
Prior research has investigated the effects of either eccentric-only training or comparing eccentric and concentric exercise on changes related to strength and power expression, but no research to date has investigated the impact of altering the duration of either the concentric or eccentric component on these parameters. Therefore, the purpose of this study was to assess the duration of eccentric (i.e. 2-second, 4-second vs. 6-second) muscle contractions and their effect on muscle strength, power production, vertical jump and soreness using a plate-loaded barbell Smith squat exercise...
October 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27780887/evaluation-of-a-motivational-pre-exercise-music-intervention
#19
Rachel Hallett, Alexandra Lamont
While music has been found to motivate exercisers during workouts, its potential as a pre-exercise motivator has rarely been investigated. This study evaluated a self-selected, pre-exercise music intervention against implementation intentions (writing down 'if … then …' sentences relating to overcoming barriers) and a control condition. A total of 50 participants (Mage = 43) took part in a longitudinal, randomised, between-participants study, from 99 recruited. For both interventions, participants had significantly more success meeting self-set exercise goals than the control group, and the music group exercised significantly more frequently than the control group...
October 25, 2016: Journal of Health Psychology
https://www.readbyqxmd.com/read/27777542/gender-differences-and-access-to-a-sports-dietitian-influence-dietary-habits-of-collegiate-athletes
#20
Michael V Hull, Andrew R Jagim, Jonathan M Oliver, Mike Greenwood, Deanna R Busteed, Margaret T Jones
BACKGROUND: Limited research exists on the effect of a sports dietitian (SD) on athletes' dietary habits and nutrient periodization, which is the deliberate manipulation of macronutrient intake to match training goals. Further, the difference in dietary habits between men and women collegiate athletes has been understudied. A survey questionnaire examining dietary habits and practices was administered to athletes at two universities that employed a full time SD. Not all athletes used the SD as their primary source for nutritional guidance...
2016: Journal of the International Society of Sports Nutrition
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