Strategic creatine supplementation and resistance training in healthy older adults
| Autor: | Darren G. Candow, Scott C. Forbes, Sarah Johannsmeyer, Emelie Vogt, Jonathan P. Farthing |
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| Rok vydání: | 2015 |
| Předmět: |
Male
Aging medicine.medical_specialty Physiology Endocrinology Diabetes and Metabolism Muscle mass Creatine chemistry.chemical_compound Absorptiometry Photon Double-Blind Method Physiology (medical) Humans Medicine Muscle Strength Aged Nutrition and Dietetics business.industry Resistance training Resistance Training General Medicine Middle Aged chemistry Dietary Supplements Body Composition Physical therapy Female business |
| Zdroj: | Applied Physiology, Nutrition, and Metabolism. 40:689-694 |
| ISSN: | 1715-5320 1715-5312 |
| DOI: | 10.1139/apnm-2014-0498 |
| Popis: | Creatine supplementation in close proximity to resistance training may be an important strategy for increasing muscle mass and strength; however, it is unknown whether creatine supplementation before or after resistance training is more effective for aging adults. Using a double-blind, repeated measures design, older adults (50–71 years) were randomized to 1 of 3 groups: creatine before (CR-B: n = 15; creatine (0.1 g/kg) immediately before resistance training and placebo (0.1 g/kg cornstarch maltodextrin) immediately after resistance training), creatine after (CR-A: n = 12; placebo immediately before resistance training and creatine immediately after resistance training), or placebo (PLA: n = 12; placebo immediately before and immediately after resistance training) for 32 weeks. Prior to and following the study, body composition (lean tissue, fat mass; dual-energy X-ray absorptiometry) and muscle strength (1-repetition maximum leg press and chest press) were assessed. There was an increase over time for lean tissue mass and muscle strength and a decrease in fat mass (p < 0.05). CR-A resulted in greater improvements in lean tissue mass (Δ 3.0 ± 1.9 kg) compared with PLA (Δ 0.5 ± 2.1 kg; p < 0.025). Creatine supplementation, independent of the timing of ingestion, increased muscle strength more than placebo (leg press: CR-B, Δ 36.6 ± 26.6 kg; CR-A, Δ 40.8 ± 38.4 kg; PLA, Δ 5.6 ± 35.1 kg; chest press: CR-B, Δ 15.2 ± 13.0 kg; CR-A, Δ 15.7 ± 12.5 kg; PLA, Δ 1.9 ± 14.7 kg; p < 0.025). Compared with resistance training alone, creatine supplementation improves muscle strength, with greater gains in lean tissue mass resulting from post-exercise creatine supplementation. |
| Databáze: | OpenAIRE |
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