Physical activity, muscle phenotypes and later function in middle-aged and older Chinese adults (CHARLS cohort)
In a CHARLS cohort of 4,323 adults aged 50 or older, physical activity was more consistently linked to muscle strength measured at the same time than to muscle abnormalities observed later. Low-grip-strength phenotypes in 2015 showed clearer links to later functional and self-rated health outcomes than equation-estimated low muscle mass. [1]
Automatic summary · not editorially reviewed
The key findings
The baseline analytic cohort included 4,323 adults aged 50 years or older with assessable muscle phenotype and physical activity information. [1]
Baseline physical activity was not consistently associated with muscle abnormalities newly observed during 2011–2015 follow-up. [1]
Isolated low grip strength in 2015 was associated with incident IADL limitation (RR = 1.550, 95% CI 1.209–1.989). [1]
The source at a glance
- Study type / format
- Multi-wave prospective cohort study (abstract)
- Population / context
- 4,323 adults aged 50 years or older in the CHARLS cohort with assessable muscle phenotype and physical activity information.
- Summary based on
- Study abstract
- Publication status
- Preprint · peer-review status not confirmed
- Original publication
- October 11, 2026
CHARLS cohort of adults aged 50 and older
The study used China Health and Retirement Longitudinal Study (CHARLS) data from 2011, 2015 and 2018. The baseline analytic cohort included 4,323 adults aged 50 years or older with assessable muscle phenotype and physical activity information. At baseline, 2,595 participants (60.0%) had a normal muscle phenotype, 961 (22.2%) isolated low muscle mass, 420 (9.7%) isolated low grip strength and 347 (8.0%) the sarcopenia phenotype. Physical activity exposures were participation (more than 0 versus 0 minutes per week) in vigorous, moderate-intensity and walking activities.
Supporting source [1]
Concurrent links to strength, not later muscle abnormalities
In cross-sectional analyses, moderate-intensity activity and walking were inversely associated with low-grip-strength phenotypes, whereas vigorous activity was positively associated with isolated low muscle mass. During 2011–2015 follow-up, 172 sarcopenia-phenotype events, 401 low-grip-strength events and 175 equation-estimated low-muscle-mass events were observed. Baseline physical activity was not consistently associated with these newly observed muscle abnormalities. These are associations, not evidence that activity causes or prevents these outcomes.
Supporting source [1]
Low grip strength in 2015 and later functional outcomes
In 2015–2018 analyses, isolated low grip strength was associated with incident limitation in instrumental activities of daily living (IADL; RR = 1.550, 95% CI 1.209–1.989) and with self-rated health deterioration (RR = 1.115, 95% CI 1.010–1.231). The sarcopenia phenotype was also associated with self-rated health deterioration (RR = 1.186, 95% CI 1.053–1.336), while isolated low muscle mass showed weaker associations. The authors conclude that low-grip-strength phenotypes in 2015 showed clearer prospective associations with later functional and self-rated health outcomes than equation-estimated low muscle mass.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Design, sample and follow-up are reported only as above. Associations are not causal; equation-estimated low muscle mass is not a direct measurement. No details on confounders, attrition or generalisability beyond the described cohort are available here.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Shao S, Li H. · europepmc.org · October 11, 2026