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J Nutr Health Aging. 2012 Jul;16(7):616-9.

Relationship between protein intake and dynapenia in postmenopausal women.

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1
Faculty of Science, Department of Kinanthropolgy, University of Quebec at Montreal, Case postale 8888, succ Centre Ville, Montreal, Canada.

Abstract

OBJECTIVE:

The purpose of this study was to investigate the relationship between protein intake and dynapenia.

DESIGN:

A cross-sectional/observational study.

SETTING:

Department of Kinanthropology at the University of Quebec at Montreal.

PARTICIPANTS:

Seventy-two non-frail postmenopausal women aged between 50 to 75 years were recruited.

MEASUREMENTS:

Body weight (BW), lean body mass (LBM; %) and skeletal muscle mass (bio-electrical impedancemetry analysis), maximum voluntary handgrip strength (using hand dynamometer), aerobic capacity (VO2peak) and dietary intake were measured. Women were divided according to dynapenia criteria.

RESULTS:

The strongest correlation between muscle strength and protein intake was observed when we express the amount of protein in g/d/BW. No differences for age, BMI, status of menopause, fat mass and VO2peak were observed between non-dynapenic, type I dynapenic and type II dynapenic women, independently of the criteria used. We observed significant differences in protein intake (g/d/BW) between non-dynapenic and type II dynapenic (p<0.01) as well as between type I dynapenic and type II dynapenic (p<0.01) when dynapenia was expressed in kg/BW and in kg/LBM, respectively. It should be noted that no differences in LBM between the three groups were observed when dynapenia was expressed in kg/BW and kg/LBM. Protein intake for all groups respected the RDA of 0.8 to 1.2 g/d/BW (non-dynapenic: 1.44/1.38; type I dynapenic: 1.30/1.33; type II dynapenic: 1.05/1.08 g/d/BW).

CONCLUSIONS:

Protein intake seems to play a role in the development of dynapenia particularly at the level of type II dynapenia. Therefore, an increase in the recommended daily allowance for protein intake may be warranted.

PMID:
22836702
[Indexed for MEDLINE]
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