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workout supplement

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
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
Y P Jung, M Koozechian, A O'Connor, S Shin, P B Collins, R Dalton, T Grubic, R Sowinski, B K Sanchez, A Coletta, M Cho, A Reyes, C Rasmussen, P S Murano, M Greenwood, C P Earnest, R B Kreider
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Majid S Koozehchian, P Blaise Collins, Abigail O'Connor, Song Yi Shin, Ryan Dalton, Tylor Grubic, Ryan Sowinski, Y Peter Jung, Brittany K Sanchez, Adriana Coletta, Minye Cho, Aimee Reyes, Chris Rasmussen, Conrad P Ernest, Peter S Murano, Mike Greenwood, Richard B Kreider
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Kevin Hummel, Andrew Gregory, Neerav Desai, Alex Diamond
Rhabdomyolysis is a syndrome characterized by muscle pain, weakness and myoglobinuria and ranges in severity from asymptomatic to life threatening with acute kidney failure. While a common condition in adult populations, it is understudied in pediatrics and the majority of adolescent cases are likely exercise-induced, caused by strenuous exercise in athletes. Recently, in our pediatric sports medicine practice, we have seen numerous cases of late adolescent high school athletes who present with severe muscle pain and were found to have elevated creatine kinase levels...
2016: Physician and Sportsmedicine
Andrew R Jagim, Margaret T Jones, Glenn A Wright, Carly St Antoine, Attila Kovacs, Jonathan M Oliver
BACKGROUND: Multi-ingredient pre-workout supplements (MIPS) are popular among resistance trained individuals. Previous research has indicated that acute MIPS ingestion may increase muscular endurance when using a hypertrophy-based protocol but less is known in regard to their effects on strength performance and high intensity running capacity. Therefore, the purpose was to determine if short-term, MIPS ingestion influences strength performance and anaerobic running capacity. METHODS: In a double-blind, randomized, placebo controlled, crossover design; 12 males (19 ± 1 yrs...
2016: Journal of the International Society of Sports Nutrition
Vince C Kreipke, Brittany R Allman, Amber W Kinsey, Robert J Moffatt, Robert C Hickner, Michael J Ormsbee
Although multi-ingredient performance supplements (MIPS) have increased in popularity because of their array of ergogenic ingredients, their efficacy and safety remain in question. The objective of this study was to determine the impact of supplementation with T+ (SUP; Onnit Labs, Austin, TX, USA), an MIPS containing long jack root, beta-alanine, and branched-chain amino acids, and other proprietary blends, on strength, body composition, and hormones in young resistance-trained men. Subjects were randomized to consume either T+ (SUP; n = 14; age, 21 ± 3 years; body fat, 18...
December 2015: Journal of Strength and Conditioning Research
Chiung-Ju Liu, Leah Y Jones, R M Formyduval A, Daniel O Clark
The purpose of this feasibility study was to evaluate the 3-Step Workout for Life program, a 10-week exercise program that included moderate-intensity muscle strength training followed by task-oriented training. Fourteen participants completed the program (mean age = 73 years; SD = 6.83). The Box and Block test (Z = -2.24, p = .03) and the 30-s chair stand test (Z = -2.21, p = .03) indicate improved physical functioning of the upper and lower extremities. More importantly, results of the function component from the Late-Life Function and Disability Instrument (Z = -2...
July 2016: Journal of Aging and Physical Activity
Andrea Petróczi, Jorge A Vela Ocampo, Iltaf Shah, Carl Jenkinson, Rachael New, Ricky A James, Glenn Taylor, Declan P Naughton
BACKGROUND: 2,4-Dinitrophenol (DNP) poses serious health-risks to humans. The aims of this three-stage multidisciplinary project were, for the first time, to assess the risks to the general public from fraudulent sale of or adulteration/contamination with DNP; and to investigate motives, reasons and risk-management among DNP-user bodybuilders and avid exercisers. METHODS: Using multiple search-engines and guidance for Internet research, online retailers and bodybuilding forums/blogs were systematically explored for availability of DNP, advice offered on DNP use and user profiles...
October 14, 2015: Substance Abuse Treatment, Prevention, and Policy
Francisca Mirian Moura Lacerda, Wellington Roberto Gomes Carvalho, Elane Viana Hortegal, Nayra Anielly Lima Cabral, Helma Jane Ferreira Veloso
OBJECTIVE To assess the factors associated with the use of dietary supplements by people who exercise at gyms.METHODS A cross-sectional study with a sample defined by convenience, considering the number of gyms registered in the Conselho Regional de Educação Física (Regional Council of Physical Education) of Sao Luis, MA, Northeastern Brazil, from July 2011 to July 2012. The final sample comprised 723 individuals who exercise at gyms. The dependent variable was supplement use, and the explanatory variables were length of time and motivation of the physical exercises, duration, goal and self-perception of training, weekly frequency of gym attendance, sex, age, educational attainment, self-perception of body weight, smoking and self-perception of diet...
2015: Revista de Saúde Pública
Adam Přibylka, Martin Švidrnoch, Juraj Ševčík, Vítězslav Maier
The CE method employing an indirect UV detection for the enantioseparation of 1,3-dimethylamylamine (DMAA), widely used in various preworkout and dietary supplements labeled as a constituent of geranium extract has been developed. The dual-selector system consisting of negatively charged sulfated α-CD (1.1% w/v) and sulfated β-CD (0.2% w/v) in 5 mM phosphate/Tris buffer (pH 3.0) containing the addition of 10 mM benzyltriethylammonium chloride (BTEAC) as the chromophoric additive was used for the enantiomeric separation of DMAA stereoisomers with the LODs in the range of 7...
December 2015: Electrophoresis
Michael J Brazeau, Joni L Castaneda, Sonny S Huitron, James Wang
The incidence of drug-induced hepatic injury has been increasing as a result of more widespread use of workout supplements containing anabolic steroids to increase muscle mass. Synthetic androgenic steroids are shown to cause cholestatic liver injury, but the exact mechanism of injury is not completely understood. We present a case of a healthy, young, active duty Army male soldier who developed pruritis and jaundice shortly after starting to take a body-building supplement containing anabolic steroids, and was subsequently found to have significant biopsy proven drug-induced liver injury...
July 2015: Military Medicine
Jordan M Joy, Ryan P Lowery, Paul H Falcone, Roxanne M Vogel, Matt M Mosman, Chih-Yin Tai, Laura R Carson, Dylan Kimber, David Choate, Michael P Kim, Jacob M Wilson, Jordan R Moon
BACKGROUND: Pre-workout supplements (PWS) have become increasingly popular with recreational and competitive athletes. While many ingredients used in PWS have had their safety assessed, the interactions when combined are less understood. OBJECTIVE: The purpose of this study was to examine the safety of 1 and 2 servings of a PWS. DESIGN: Forty-four males and females (24.4±4.6 years; 174.7±9.3 cm; 78.9±18.6 kg) from two laboratories participated in this study...
2015: Food & Nutrition Research
Malcolm J D'Souza, Karri-Jo E Walls, Christine Rojas, Lynn M Everett, Derald E Wentzien
The 2010 Centers for Disease Control and Prevention (CDC) report indicates that 63.4% of Delaware's adult population is overweight and 28% is obese. Here, the authors reveal analyses acquired from detailed investigations about the importance of gender, and other lifestyle factors and behaviors on the Body Mass Index (BMI) trends amongst an indiscriminate sample of the Wesley College (Wesley) undergraduate population. A 25-question paper-format survey was distributed to 307 randomly chosen Wesley undergraduates...
June 2015: American Journal of Health Sciences
Marie Claire Van Hout, Evelyn Hearne
No abstract text is available yet for this article.
December 2015: International Journal on Drug Policy
Roxanne M Vogel, Jordan M Joy, Paul H Falcone, Matt M Mosman, Michael P Kim, Jordan R Moon
BACKGROUND: Pre-workout supplements (PWS) have increased in popularity among athletic populations for their purported ergogenic benefits. Most PWS contain a "proprietary blend" of several ingredients, such as caffeine, beta-alanine, and nitrate in undisclosed dosages. Currently, little research exists on the safety and potential side effects of chronic consumption of PWS, and even less so involving female populations. Therefore, the purpose of the present study was to examine the safety of consuming a dose-escalated PWS over a 28-day period among active adult females...
2015: Journal of the International Society of Sports Nutrition
Jordan J Outlaw, Colin D Wilborn, Abbie E Smith-Ryan, Sara E Hayward, Stacie L Urbina, Lem W Taylor, Cliffa A Foster
BACKGROUND: Pre-workout supplements containing numerous ingredients claim to increase performance and strength. Product-specific research is important for identifying efficacy of combined ingredients. The purpose of this study was to evaluate the effects of a proprietary pre-workout dietary supplement containing creatine monohydrate, beta-alanine, L-Tarurine, L-Leucine, and caffeine, on anaerobic power, muscular strength, body composition, and mood states. METHODS: In a double-blind, randomized, matched-pair design, twenty male subjects (mean ± SD; 22...
2014: Journal of the International Society of Sports Nutrition
J C Aristizabal, D J Freidenreich, B M Volk, B R Kupchak, C Saenz, C M Maresh, W J Kraemer, J S Volek
BACKGROUND/OBJECTIVES: Fat-free mass (FFM) is the major predictor of resting metabolic rate (RMR). As protein supplementation during resistance training may augment gains in FFM, we investigated the effects of resistance training combined with protein supplementation on RMR and whether RMR responses could be estimated by a dual-energy X-ray absorptiometry (DXA) metabolic map. SUBJECTS/METHODS: Healthy adults completed a whole-body periodized resistance training program consisting of 96 workouts (~9 months)...
July 2015: European Journal of Clinical Nutrition
Jordan J Outlaw, Colin D Wilborn, Abbie E Smith-Ryan, Sara E Hayward, Stacie L Urbina, Lem W Taylor, Cliffa A Foster
PURPOSE: The purpose was to assess effects of a pre- and a post-workout protein-carbohydrate supplement on CrossFit-specific performance and body composition. METHODS: In an open label randomized study, 13 male and 16 female trained Crossfit participants (mean ± SD; age: 31.87 ± 7.61 yrs, weight: 78.68 ± 16.45 kg, percent body fat: 21.97 ± 9.02) were assessed at 0 and 6 weeks for body composition, VO2max, Wingate peak (WPP) and mean power (WMP), in addition to sport-specific workouts (WOD1: 500 m row, 40 wall balls, 30 push-ups, 20 box jumps, 10 thrusters for time; WOD2: 15 minutes to complete an 800 m run "buy in", followed by as many rounds as possible (AMRAP) of 5 burpees, 10 Kettlebell swings, 15 air squats)...
2014: SpringerPlus
Debra D Coffey
BACKGROUND: The use of over-the-counter medications and nutritional supplements is prohibited while flying without approval from an aeromedical professional. Despite prohibition, the use of nutritional supplements is common in aircrew due to the perception that these supplements are harmless; in reality, the use of nutritional supplements may be more dangerous than the use of traditional medications. Multiple case reports of adverse neurologic and cardiovascular events associated with the use of specific supplements led the FDA to ban ephedra in 2004 and DMAA in 2012, both marketed as "natural stimulants...
June 2014: Aviation, Space, and Environmental Medicine
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