title: The effect of beta-hydroxy beta-methylbutyrate on muscular strength and body composition in collegiate football players.
abstract: This study assesses the effects of daily beta-hydroxy beta-methylbutyrate (HMB) supplementation on muscular strength (bench press, squats, and power cleans) and body composition (body weight and body fat) among collegiate football players undergoing a strenuous exercise program. Subjects were collegiate football players (n = 35) training under the supervision of certified strength coaches averaging 20 hours of weekly exercise. In the first supplementation period, 16 of the 35 subjects were supplemented with 3 g of HMB per day for 4 weeks; the other 19 received a placebo followed by a 1-week washout period and then a second supplementation period in a randomized double-blind crossover, placebo design. There were no significant changes (p > 0.05) in muscular strength, including bench press, squats, and power cleans, among the subjects. There were also no significant changes (p > 0.05) in body composition, including body fat and body weight. Very little clinical evidence exists for supplementing HMB in athletic populations.
authors.affiliation: College of Education, Oklahoma State University, Stillwater, Oklahoma 74078, USA. ransone@okstate.edu
authors.forename: Jack
authors.initials: J
authors.lastname: Ransone
authors.forename: Kerri
authors.initials: K
authors.lastname: Neighbors
authors.forename: Robert
authors.initials: R
authors.lastname: Lefavi
authors.forename: Joseph
authors.initials: J
authors.lastname: Chromiak
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology; D000328:Adult; D001823:Body Composition / Q000187:drug effects*; D018592:Cross-Over Studies; D019587:Dietary Supplements; D004311:Double-Blind Method; D005538:Football / Q000502:physiology*; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects*; D018482:Muscle, Skeletal / Q000187:drug effects / Q000502:physiology*; D010807:Physical Endurance; D014631:Valerates / Q000494:pharmacology*
chemical_list: D014631:Valerates; C004961:beta-hydroxyisovaleric acid