期刊
BRITISH JOURNAL OF NUTRITION
卷 115, 期 7, 页码 1281-1291出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S000711451600012X
关键词
Dietary protein intake; Physical function; Muscle strength; Sarcopaenia; Elderly women
资金
- Finnish Cultural Foundation (Hulda Tossavainen Foundation)
- Sigrid Juselius Foundation
- Academy of Finland
- Kuopio University Hospital EVO grant
- Paivikki ja Sakari Sohlbergin foundation [2543]
Dietary protein intake might be beneficial to physical function (PF) in the elderly. We examined the cross-sectional and prospective associations of protein intake of g/kg body weight (BW), fat mass (FM) and lean mass (LM) with PF in 554 women aged 653-716 years belonging to the Osteoporosis Risk Factor and Prevention Fracture Prevention Study. Participants filled a questionnaire on lifestyle factors and 3-d food record in 2002. Body composition was measured by dual-energy X-ray absorptiometry, and PF measures were performed at baseline and at 3-year follow-up. Sarcopaenia was defined using European Working Group on Sarcopenia in Older People criteria. At the baseline, women with higher protein intake (12 g/kg BW) had better performance in hand-grip strength/body mass (GS/BM) (P=0001), knee extension/BM (P=0003), one-leg stance (P=0047), chair rise (P=0043), squat (P=0019), squat to the ground (P=0001), faster walking speed for 10 m (P=0005) and higher short physical performance battery score (P=0004) compared with those with moderate and lower intakes (081-119 and 08 g/kg BW, respectively). In follow-up results, higher protein intake was associated with less decline in GS/BM, one-leg stance and tandem walk for 6 m over 3 years. Overall, results were no longer significant after controlling for FM. Associations were detected between protein intake and PF in non-sarcopaenic women but not in sarcopaenic women, except for change of GS (P=0037). Further, FM but not LM was negatively associated with PF measures (P<0050). This study suggests that higher protein intake and lower FM might be positively associated with PF in elderly women.
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