Dietary protein intake and protein sources and their associations with selected muscle and physical function measures in older Chinese adults with sarcopenia: preliminary findings
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AbstractBackground and aims: Protein intake is a major risk factor of sarcopenia. We aimed to assess the dietary protein intake and sources and their associations with muscle and physical function measures in older Chinese adults with sarcopenia.

Methods: Baseline data of 62 Chinese sarcopenic adults aged >65 of an ongoing trial of assessing the role of exercise and nutrition in sarcopenia were analyzed. Sarcopenia was defined using the Asian Working Group Criteria. Dietary data were assessed using a 3-day diet record. Physical activity was measured using the Physical Activity Scale for the Elderly (PASE). Measurements included body composition, 6-meter usual pace walk, seated medicine ball throw, 5-chair stands, 6-minute walk test, leg extension and SF-12. Linear regression analyses were used to examine the age- and sex-adjusted association of dietary protein intake and sources with various outcomes.

Results: Relative protein intake averaged 1.6 ± 0.5 g/kg-bw/day. Nine (14.5%) participants showed a protein intake below 1.2 g/kg-bw/day. Animal sources and plant sources contributed to 60% and 40%, respectively, of the total protein intake. Dietary protein intake averaged 12.7 ± 8.3 g/day at breakfast, 21.4 ± 10.5 g/day at lunch and 30.4 ± 12.3 g/day at dinner. Animal protein contributed to 48.5%, 56.0% and 65.6% of protein intake at breakfast, lunch and dinner, respectively. There was no association between total protein intake and outcome measures. Animal protein intake was inversely associated with seated medicine ball throw, 6-minute walk test, and leg extension. Plant protein intake was positively associated with SF-12. Regression analyses showed PASE as a more significant factor to various outcome measures compared to protein intake and sources.

Conclusions: We found a minimal association of protein intake and sources with muscle and physical function measures in older Chinese adults with sarcopenia, possibly due to the replete protein intake of our sample.
All Author(s) ListRuth Chan, Liu-Ying Zhu, Suey Yeung, Liz Li, Timothy Kwok, Jean Woo
Journal nameJournal of Cachexia, Sarcopenia and Muscle
Volume Number7
Issue Number5
LanguagesEnglish-United Kingdom

Last updated on 2021-01-03 at 01:34