New approach for weight reduction by a combination of diet, light resistance exercise and the timing of ingesting a protein supplement

Citation
T. Doi et al., New approach for weight reduction by a combination of diet, light resistance exercise and the timing of ingesting a protein supplement, ASIA P J CL, 10(3), 2001, pp. 226-232
Citations number
41
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Endocrynology, Metabolism & Nutrition
Journal title
ASIA PACIFIC JOURNAL OF CLINICAL NUTRITION
ISSN journal
0964-7058 → ACNP
Volume
10
Issue
3
Year of publication
2001
Pages
226 - 232
Database
ISI
SICI code
0964-7058(2001)10:3<226:NAFWRB>2.0.ZU;2-N
Abstract
We have reported that ingesting a meal immediately after exercise increased skeletal muscle accretion and less adipose tissue accumulation in rats emp loyed in a 10 week resistance exercise program. We hypothesized that a poss ible increase in the resting metabolic rate (RMR) as a result of the larger skeletal muscle mass might be responsible for the less adipose deposition. Therefore, the effect of the timing of a protein supplement after resistan ce exercise on body composition and the RMR was investigated in 17 slightly overweight men. The subjects participated in a 12-week weight reduction pr ogram consisting of mild energy restriction (17% energy intake reduction) a nd a light resistance exercise using a pair of dumbbells (3-5 kg). The subj ects were assigned to two groups. Group S ingested a protein supplement (10 g protein, 7 g carbohydrate, 3.3 g fat and one-third of recommended daily allowance (RDA) of vitamins and minerals) immediately after exercise. Group C did not ingest the supplement. Daily intake of both energy and protein w as equal between the two groups and the protein intake met the RDA. After 1 2 weeks, the bodyweight, skinfold thickness, girth of waist and hip and per centage bodyfat significantly decreased in the both groups, however, no sig nificant differences were observed between the groups. The fat-free mass si gnificantly decreased in C, whereas its decrease in S was not significant. The RMR and post-meal total energy output significantly increased in S, whi le these variables did not change in C. In addition, the urinary nitrogen e xcretion tended to increase in C but not in S. These results suggest that t he RMR increase observed in S might be associated with an increase in body protein synthesis.