Effect of Preexercise Creatine Ingestion on Muscle Performance in Healthy Aging Males.
Study Goal
The researchers aimed to determine whether a bolus ingestion of creatine (compared to maltodextrin placebo) consumed 3 hours before resistance exercise affects muscle performance in aging males.
Results Summary
The study found no significant difference in muscle performance (leg press and chest press repetitions to fatigue) between creatine and maltodextrin placebo conditions, suggesting maltodextrin had no effect on exercise outcomes.
Population
Healthy aging males (N = 9, 54.8 ± 4.3 years).
Effective Dosage
20 g maltodextrin (single dose).
Duration
Single administration (7 days apart from creatine condition).
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
Preexercise creatine supplementation | increase | aging muscle performance | - | - | may have a beneficial effect | #1 |
creatine (20 g) | decrease | leg press and chest press | healthy males (N = 9, 54.8 ± 4.3 years; 92.9 ± 11.5 kg; 179.2 ± 11.1 cm) | - | There was a set main effect | #2 |
creatine (20 g) | decrease | leg press and chest press repetitions to muscle fatigue (3 sets at 70% 1-repetition maximum; 1 minute rest between sets) | healthy males (N = 9, 54.8 ± 4.3 years; 92.9 ± 11.5 kg; 179.2 ± 11.1 cm) | - | the number of repetitions performed decreasing similarly for creatine and placebo | #3 |
a bolus ingestion of creatine consumed 3 hours before resistance exercise | no change | upper or lower-body muscle performance | healthy aging males | - | has no effect | #4 |
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.