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Associations Between Dietary Nutrient Intake and Muscle Mass and Strength in Community-Dwelling Older Adults: The Tasmanian Older Adult Cohort Study


Scott, D and Blizzard, L and Fell, J and Giles, G and Jones, G, Associations Between Dietary Nutrient Intake and Muscle Mass and Strength in Community-Dwelling Older Adults: The Tasmanian Older Adult Cohort Study, American Geriatrics Society. Journal, 58, (11) pp. 2129-2134. ISSN 0002-8614 (2010) [Refereed Article]

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DOI: doi:10.1111/j.1532-5415.2010.03147.x


OBJECTIVES: To describe associations between dietary nutrient intake and progression of sarcopenia, the age-related loss of muscle mass and strength. DESIGN: Prospective cohort study of community-dwelling older adults. SETTING: Southern Tasmania, Australia. PARTICIPANTS: Seven hundred forty noninstitutionalized older adults (50% female; mean age 627) randomly sampled from electoral rolls. MEASUREMENTS: Dietary nutrient intake was examined at baseline and follow-up (2.60.4 years later) using The Cancer Council Victoria's Food Frequency Questionnaire (FFQ). Appendicular lean mass (aLM) was assessed using dual X-ray absorptiometry and muscle strength of the knee extensors using a dynamometer. RESULTS: Failing to meet the recommended dietary intake for protein was associated with significantly lower aLM at baseline (−0.81 kg, 95% confidence interval (CI)=−1.54 to −0.08) and follow-up (−0.79 kg, 95%CI=−1.42 to −0.17). Energy-adjusted protein intake was a positive predictor of change in aLM over 2.6 years (=0.10, P=.003). Energy-adjusted intake of iron (=0.07, P=.02), magnesium (=0.07, P=.02), phosphorus (=0.07, P=.047), and zinc (=0.08, P=.02) were positive predictors of change in aLM, whereas retinol (=−0.09, P=.005) was a negative predictor of change in aLM after adjustment for protein intake. No significant associations were observed between nutrient intake and muscle strength. CONCLUSION: Protein and several other dietary nutrients are associated with muscle mass and rate of muscle loss (but not strength) in older adults, suggesting that multiple dietary components may ameliorate the progression of sarcopenia.

Item Details

Item Type:Refereed Article
Keywords:sarcopenia; diet; aging
Research Division:Biomedical and Clinical Sciences
Research Group:Clinical sciences
Research Field:Rheumatology and arthritis
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Scott, D (Mr David Scott)
UTAS Author:Blizzard, L (Professor Leigh Blizzard)
UTAS Author:Fell, J (Associate Professor James Fell)
UTAS Author:Jones, G (Professor Graeme Jones)
ID Code:65459
Year Published:2010
Web of Science® Times Cited:151
Deposited By:Menzies Institute for Medical Research
Deposited On:2010-11-17
Last Modified:2011-05-02
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