ArticleThe journals of gerontology. Series A, Biological sciences and medical sciences2026
Compositional data analysis of 24hr activity and its associations with muscle strength and power: The Study of Muscle, Mobility and Aging.
Article in The journals of gerontology. Series A, Biological sciences and medical sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors.
Funding
Abstract
backgroundPhysical activity (PA) and inactivity have opposing associations with skeletal muscle function and are often studied separately but are codependent. We evaluated cross-sectional associations between 24-h time-use behaviors with muscle strength and power.
methodsSample included 751 community-dwelling older adults (76 ± 5 years, 57% women). Compositional data analysis determined 24-h proportions of time in moderate-to-vigorous PA (MVPA) and light intensity PA (LPA), inactivity, and sleep. Multiple linear regression by sex evaluated associations between 24-h composition with stair climb ascend and leg press power (W), and leg press (lbs) and grip strength (kg). Compositional isotemporal substitution quantified hypothetical reallocations of time between behaviors on power and strength.
resultsCompared to the average 24hr day in women (MVPA: 84 min/day, LPA: 349 min/day, inactivity: 559 min/day, sleep: 448 min/day), higher 24-h proportions of MVPA were associated with higher stair climb power (β: 16.2, 95% CI: 10.9, 21.4), leg press power (β: 23.7, 95% CI: 10.3, 37.2), and leg strength (β: 8.5, 95% CI: 2.4, 14.6); higher 24-h proportions of LPA were associated with lower stair climb power (β: -14.4, 95% CI: -25.8, -3.0); and higher 24-h proportions of inactivity were associated with higher grip strength (β: 2.3, 95% CI: 0.4, 4.3). Compositional isotemporal substitution found reallocating 10 min from LPA or inactivity to MVPA supported higher power and strength. No associations were observed in men.
conclusionsIn women, not men, 24-h movement composition was associated with power and strength. MVPA interventions for power and strength improvements in women may be optimized when LPA or inactivity are reduced, not sleep.
Indexed as
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.