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Differences in muscle adaptation to a 12-week mixed power training in elderly men, depending on usual protein intake
- Source :
- Experimental Gerontology. 104:78-85
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Introduction Normal aging is often associated with a decline of muscle mass (MM), strength (MS) and quality (MQ: MS/MM), leading to functional incapacities. This aging-related deterioration of muscles may involve a decreased protein intake. Mixed power training has been recently shown to induce positive effects on MM, MS and MQ. However, to our knowledge, no study has examined if muscle adaptations following mixed power training could be influenced by the daily amount of protein ingested in elderly men. Methods Twenty-one men completed the intervention and were divided into 2 groups based on their usual protein intake: PROT 1.1− ( 1.2 g·kg−1·d−1 [n = 11; 73 ± 3 years]). Body composition (DXA: lean and fat masses), MS (1-maximal repetition on leg-press and handgrip strength), MQ (MS/body mass and MS/lower limb lean mass), functional capacities (Short Physical Performance Battery/Senior Fitness Test), dietary intake (3-day food record) and energy expenditure (accelerometer; 7 days) were measured. Mixed power training intervention consisted in power and functional exercises (12 weeks; 3 times/week; 1 h/session). Results Lower limb MS increase in the PROT 1.2+ group was greater from that of the PROT 1.1− group when normalized to lower limbs lean mass (p = 0.036). In addition, a trend for greater gain in lower limb MS normalized to body mass (p = 0.053) was observed in the PROT 1.2+. Conclusion To optimize mixed power training effects on muscle function, healthy older men should ingest daily at least 1.2 g·kg−1·d−1 of protein. These beneficial effects of a higher usual protein intake were observed especially for MQ, which is one of the best predictors of functional capacities in older adults.
- Subjects :
- Male
0301 basic medicine
Aging
medicine.medical_specialty
Normal aging
Biochemistry
Body Mass Index
03 medical and health sciences
0302 clinical medicine
Endocrinology
Internal medicine
Genetics
medicine
Humans
Muscle Strength
030212 general & internal medicine
Muscle, Skeletal
Molecular Biology
Aged
Geriatrics
Leg
030109 nutrition & dietetics
Hand Strength
business.industry
Muscle adaptation
Resistance Training
Cell Biology
Protein intake
medicine.disease
Adaptation, Physiological
Functional exercises
Fitness test
Sarcopenia
Body Composition
Lean body mass
Dietary Proteins
Energy Intake
Energy Metabolism
business
Subjects
Details
- ISSN :
- 05315565
- Volume :
- 104
- Database :
- OpenAIRE
- Journal :
- Experimental Gerontology
- Accession number :
- edsair.doi.dedup.....89dadb30535dcca48ea90f255fd08b61
- Full Text :
- https://doi.org/10.1016/j.exger.2018.02.001