title: Effect of Preexercise Creatine Ingestion on Muscle Performance in Healthy Aging Males.
abstract: Preexercise creatine supplementation may have a beneficial effect on aging muscle performance. Using a double-blind, repeated measures, crossover design, healthy males (N = 9, 54.8 ± 4.3 years; 92.9 ± 11.5 kg; 179.2 ± 11.1 cm) were randomized to consume creatine (20 g) and placebo (20 g corn starch maltodextrin), on 2 separate occasions (7 days apart), 3 hours before performing leg press and chest press repetitions to muscle fatigue (3 sets at 70% 1-repetition maximum; 1 minute rest between sets). There was a set main effect (p ≤ 0.05) for the leg press and chest press with the number of repetitions performed decreasing similarly for creatine and placebo. These results suggest that a bolus ingestion of creatine consumed 3 hours before resistance exercise has no effect on upper or lower-body muscle performance in healthy aging males.
authors.affiliation: 1Faculty of Kinesiology & Health Studies, University of Regina, Regina, Saskatchewan, Canada; and2College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
authors.forename: Taylor P
authors.initials: TP
authors.lastname: Baker
authors.forename: Darren G
authors.initials: DG
authors.lastname: Candow
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Farthing
mesh_terms: D000375:Aging / Q000187:drug effects / Q000502:physiology*; D003401:Creatine / Q000008:administration & dosage*; D018592:Cross-Over Studies; D019587:Dietary Supplements; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018763:Muscle Fatigue / Q000187:drug effects* / Q000502:physiology; D018482:Muscle, Skeletal / Q000187:drug effects / Q000502:physiology*
chemical_list: D003401:Creatine