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Soy protein ingestion results in less prolonged p70S6 kinase phosphorylation compared to whey protein after resistance exercise in older men
- Source :
- Journal of the International Society of Sports Nutrition
- Publication Year :
- 2015
- Publisher :
- Informa UK Limited, 2015.
-
Abstract
- Background The phosphorylation of p70S6 Kinase (p70S6K) is an important step in the initiation of protein translation. p70S6K phosphorylation is enhanced with graded intakes of whey protein after resistance exercise. Soy protein ingestion results in lower muscle protein synthesis after exercise compared with whey; however, the underlying mechanisms responsible for this difference have not been reported. Findings 13 older men (60–75) completed an acute bout of lower body resistance exercise and ingested 30 g of soy protein or carbohydrate. Muscle biopsies were obtained in the rested and fasted state and 2 and 4 hours post exercise. Phosphorylation status of p70S6K was measured with western blot. Results were compared with previously reported data from the ingestion of 30 g of whey protein or placebo. p70S6K phosphorylation was increased 2, but not 4 hours post exercise with soy protein ingestion. p70S6K phosphorylation was not increased post exercise with carbohydrate ingestion. Conclusions Ingesting 30 g of either whey or soy protein resulted in equivalent p70S6K phosphorylation at 2 hours post exercise, however, unlike whey, soy protein failed to promote prolonged phosphorylation of p70S6K to 4 hours post-exercise.
- Subjects :
- Gerontology
Aging
Sarcopenia
medicine.medical_specialty
Whey protein
Nutrition and Dietetics
Supplementation
business.industry
digestive, oral, and skin physiology
Short Report
Resistance training
food and beverages
Clinical nutrition
medicine.disease
Anabolic signalling
Endocrinology
P70S6 kinase
Internal medicine
medicine
Phosphorylation
Ingestion
business
Soy protein
Food Science
Subjects
Details
- ISSN :
- 15502783
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Journal of the International Society of Sports Nutrition
- Accession number :
- edsair.doi.dedup.....4a34be2fb73122315da5faa63f71dd20
- Full Text :
- https://doi.org/10.1186/s12970-015-0070-2