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https://www.readbyqxmd.com/read/28910233/effects-of-supplementation-with-beef-or-whey-protein-versus-carbohydrate-in-master-triathletes
#1
Fernando Naclerio, Marco Seijo, Eneko Larumbe-Zabala, Nadia Ashrafi, Tatiana Christides, Bettina Karsten, Birthe V Nielsen
OBJECTIVE: The present study compares the effect of ingesting hydrolyzed beef protein, whey protein, and carbohydrate on performance, body composition (via plethysmography), muscular thickness, and blood indices of health, including ferritin concentrations, following a 10-week intervention program. METHODS: After being randomly assigned to one of the following groups-beef, whey, or carbohydrate-24 master-age (35-60 years old) male triathletes (n = 8 per treatment) ingested 20 g of supplement mixed with plain water once a day (immediately after training or before breakfast)...
September 14, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28885973/hemorrhagic-stroke-in-a-young-healthy-male-following-use-of-pre-workout-supplement-animal-rage-xl
#2
Brandon F Harris, Coty Winn, Thomas B Ableman
So-called "pre-workout" supplements are substances marketed as natural dietary supplements with claims of helping athletes achieve more focused and intense workouts. The use of such products remains popular among American youth as a whole, but is especially high among active duty service members. Supplements are minimally regulated by the Food and Drug Administration (FDA), and unlike pharmaceuticals, supplements are often brought to market without any testing to show neither efficacy nor safety. Several case reports have documented serious adverse events and raise the question of whether supplement use was a causative factor...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28839121/dietary-supplement-drug-interaction-induced-serotonin-syndrome-progressing-to-acute-compartment-syndrome
#3
Yesha A Patel, Nino Marzella
BACKGROUND Dietary supplements have been associated with an increase in emergency intervention as a result of unexpected adverse events. Limited resources and information on significant drug-drug interactions with dietary supplements and prescription medications have contributed to associated complications and unexpected events. We present the case of a patient who consumed multiple prescription medications and dietary supplements which resulted in significant complications. CASE REPORT A 28-year-old man presented to the Emergency Department complaining of severe calf pain after exercising...
August 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28642676/international-society-of-sports-nutrition-position-stand-protein-and-exercise
#4
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/28530448/carbohydrates-alone-or-mixing-with-beef-or-whey-protein-promote-similar-training-outcomes-in-resistance-training-males-a-double-blind-randomized-controlled-clinical-trial
#5
Fernando Naclerio, Marco Seijo-Bujia, Eneko Larumbe-Zabala, Conrad P Earnest
Beef powder is a new high-quality protein source scarcely researched relative to exercise performance. The present study examined the impact of ingesting hydrolyzed beef protein, whey protein, and carbohydrate on strength performance (1RM), body composition (via plethysmography), limb circumferences and muscular thickness (via ultrasonography), following an 8-week resistance-training program. After being randomly assigned to one of the following groups: Beef, Whey, or Carbohydrate, twenty four recreationally physically active males (n=8 per treatment) ingested 20 g of supplement, mixed with orange juice, once a day (immediately after workout or before breakfast)...
May 22, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28515842/casein-protein-supplementation-in-trained-men-and-women-morning-versus-evening
#6
Jose Antonio, Anya Ellerbroek, Corey Peacock, Tobin Silver
The purpose of this investigation was to determine the effects of casein supplementation (54 grams) in the morning (Casein-MOR) or evening (Casein-EVE) (90 minutes or less prior to sleep) on measures of body composition and exercise performance in trained men and women. Twenty-six healthy men and women who had been training regularly for greater than 12 months completed this 8-week study (mean±SD; Casein-MOR group [n=14, seven male, seven female]: 30.0±8.2 yr; 170.7±9.5 cm; 70.9±13.9 kg. Casein-EVE group [n=12, nine male, three female]: 28...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28441760/supplementation-with-a-polyphenol-rich-extract-perfload-%C3%A2-improves-physical-performance-during-high-intensity-exercise-a-randomized-double-blind-crossover-trial
#7
Julien Cases, Cindy Romain, Cristian Marín-Pagán, Linda H Chung, José Miguel Rubio-Pérez, Caroline Laurent, Sylvie Gaillet, Emmanuelle Prost-Camus, Michel Prost, Pedro E Alcaraz
Workout capacity is energy-production driven. To produce peak metabolic power outputs, the organism predominantly relies more on anaerobic metabolism, but this undoubtedly has a negative and limiting impact on muscle function and performance. The aim of the study was to evaluate if an innovative polyphenol-based food supplement, PerfLoad(®), was able to improve metabolic homeostasis and physical performance during high-intensity exercises under anaerobic conditions. The effect of a supplementation has been investigated on fifteen recreationally-active male athletes during a randomized, double-blind and crossover clinical investigation...
April 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28436092/effects-of-creatine-supplementation-on-cardiac-autonomic-functions-in-bodybuilders
#8
Kadir Uğur Mert, Serdar Ilgüy, Muhammet Dural, Gurbet Özge Mert, Engin Özakin
Bodybuilder-type workouts may affect heart rate variability (HRV), which has considerable potential to assess the role of autonomic nervous system (ANS). A scientifically designed approach is necessary for bodybuilders to achieve better results while protecting their health. In this study, we aimed to investigate HRV parameters in bodybuilders compared to healthy control subjects and effects of creatine supplementation. A total of 48 male participants (16 controls, 16 supplement (-), 16 supplement (+)) were evaluated in our study...
June 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28429998/the-efficacy-of-a-pre-workout-vegan-supplement-on-high-intensity-cycling-performance-in-healthy-college-aged-males
#9
Gabrielle Gallien, David Bellar, Greggory R Davis
There is a limited supply of sport nutrition supplements currently available for vegan or vegetarian athletes. In addition, the efficacy of a vegan or vegetarian pre-workout supplement that does not contain any processed ingredients or stimulants is currently unknown. The purpose of the current study was to examine the effects of an unprocessed vegan pre-workout supplement on high-intensity cycling performance. Participants completed three separate cycling trials following the consumption of a vegan pre-workout supplement, an isocaloric processed supplement, or a zero-calorie placebo supplement...
November 2, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28426517/effects-of-betaine-supplementation-on-muscle-strength-and-power-a-systematic-review
#10
Ahmed Ismaeel
Ismaeel, A. Effects of betaine supplementation on muscle strength and power: a systematic review. J Strength Cond Res 31(8): 2338-2346, 2017-Betaine (BET) has recently gotten much attention for its potential role as an ergogenic aid and has become a common ingredient in peri-workout dietary supplements. The purpose of this systematic review of the literature was to investigate the effects of BET supplementation on muscular strength and power. A computerized literature search of 3 databases (PubMed, MEDLINE, and Scopus) was performed...
August 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28328712/resistance-training-induced-elevations-in-muscular-strength-in-trained-men-are-maintained-after-2-weeks-of-detraining-and-not-differentially-affected-by-whey-protein-supplementation
#11
RANDOMIZED CONTROLLED TRIAL
Paul S Hwang, Thomas L Andre, Sarah K McKinley-Barnard, Flor E Morales Marroquín, Joshua J Gann, Joon J Song, Darryn S Willoughby
Hwang, PS, Andre, TL, McKinley-Barnard, SK, Morales Marroquín, FE, Gann, JJ, Song, JJ, and Willoughby, DS. Resistance training-induced elevations in muscular strength in trained men are maintained after 2 weeks of detraining and not differentially affected by whey protein supplementation. J Strength Cond Res 31(4): 869-881, 2017-Resistance training (RT) with nutritional strategies incorporating whey protein intake postexercise can stimulate muscle protein synthesis and elicit hypertrophy. The early phases of training-induced anabolic responses can be attenuated with longer-term training...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28276901/regular-consumption-of-holisfiit-a-polyphenol-rich-extract-based-food-supplement-improves-mind-and-body-well-being-of-overweight-and-slightly-obese-volunteers-a-randomized-double-blind-parallel-trial
#12
Cindy Romain, Pedro Emilio Alcaraz, Linda Haiwon Chung, Julien Cases
Modern lifestyles face growing demands for natural solutions to help improve general well-being. Accordingly, mind-body activities such as yoga have considerably grown. However, beneficial effects require regular workout. Besides, literature suggests that polyphenols may demonstrate positive effects on both mental and physical health. Overweight and obese volunteers, for which well-being might be perceived degraded, were included in a 16-week double-blind, randomized and parallel trial with a daily supplementation of HolisFiit(®), a polyphenol-rich food supplement...
November 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28096758/effects-of-acute-ingestion-of-a-pre-workout-dietary-supplement-with-and-without-p-synephrine-on-resting-energy-expenditure-cognitive-function-and-exercise-performance
#13
Y Peter Jung, Conrad P Earnest, Majid Koozehchian, Elfego Galvan, Ryan Dalton, Dillon Walker, Christopher Rasmussen, Peter S Murano, Mike Greenwood, Richard B Kreider
BACKGROUND: The purpose of this study was to examine the effects of acute ingestion of a pre-workout dietary supplement (PWS) with and without p-synephrine (S) on perceptions of readiness to perform, cognitive function, exercise performance, and markers of safety. METHODS: In a randomized, double-blind, and counterbalanced manner; 25 healthy and recreationally active male and female participants ingested a flavored maltodextrin placebo (PLA), a PWS containing beta-alanine (3 g), creatine nitrate as a salt (2 g), arginine alpha-ketoglutarate (2 g), N-Acetyl-L-Tyrosine (300 mg), caffeine (284 mg), Mucuna pruiriens extract standardized for 15% L-Dopa (15 mg), Vitamin C as Ascorbic Acid (500 mg), niacin (60 mg), folate as folic acid (50 mg), and Vitamin B12 as Methylcobalamin (70 mg) with 2 g of maltodextrin and flavoring; or, the PWS with Citrus aurantium (PWS + S) extract standardized for 30% p-synephrine (20 mg)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28096757/effects-of-ingesting-a-pre-workout-dietary-supplement-with-and-without-synephrine-for-8%C3%A2-weeks-on-training-adaptations-in-resistance-trained-males
#14
Y Peter Jung, Conrad P Earnest, Majid Koozehchian, Minye Cho, Nick Barringer, Dillon Walker, Christopher Rasmussen, Mike Greenwood, Peter S Murano, Richard B Kreider
BACKGROUND: The purpose of this study was to examine whether ingesting a pre-workout dietary supplement (PWS) with and without synephrine (S) during training affects training responses in resistance-trained males. METHODS: Resistance-trained males (N = 80) were randomly assigned to supplement their diet in a double-blind manner with either a flavored placebo (PLA); a PWS containing beta-alanine (3 g), creatine nitrate as a salt (2 g), arginine alpha-ketoglutarate (2 g), N-Acetyl-L-Tyrosine (300 mg), caffeine (284 mg), Mucuna pruiriens extract standardized for 15% L-Dopa (15 mg), Vitamin C as Ascorbic Acid (500 mg), niacin (60 mg), folate as folic acid (50 mg), and Vitamin B12 as Methylcobalamin (70 mg); or, the PWS supplement with Citrus aurantium extract containing 20 mg of synephrine (PWS + S) once per day for 8-weeks during training...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28070459/pre-versus-post-exercise-protein-intake-has-similar-effects-on-muscular-adaptations
#15
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/28028619/effects-of-protein-carbohydrate-supplementation-on-immunity-and-resistance-training-outcomes-a-double-blind-randomized-controlled-clinical-trial
#16
RANDOMIZED CONTROLLED TRIAL
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...
February 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28005561/risk-factors-for-collegiate-swimmers-hospitalized-with-exertional-rhabdomyolysis
#17
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
#18
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/27777542/gender-differences-and-access-to-a-sports-dietitian-influence-dietary-habits-of-collegiate-athletes
#19
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
https://www.readbyqxmd.com/read/27429596/the-effect-of-acute-pre-workout-supplementation-on-power-and-strength-performance
#20
RANDOMIZED CONTROLLED TRIAL
Nic Martinez, Bill Campbell, Madison Franek, Laura Buchanan, Ryan Colquhoun
BACKGROUND: Consumption of pre-workout dietary supplements by both recreational and competitive athletes has increased dramatically in recent years. The purpose of this study was to determine the acute effects of a caffeine-containing pre-workout dietary supplement on various measures of performance including anaerobic power, upper and lower body power, and upper body strength in recreationally trained males. METHODS: Thirteen males (mean ± SD age = 24 ± 6 yrs; height = 180...
2016: Journal of the International Society of Sports Nutrition
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