Twenty-four-hour movement composition is associated with HR-pQCT bone strength in older adults: The Study of Muscle, Mobility and Aging (SOMMA)
Authors' conclusion
These data support the importance of MVPA for a healthy skeleton in older men and women.
Study context
- Population
- Community-dwelling older adults, SOMMA baseline visit; mean age 76.3±4.6 yrs; wrist ActiGraph GT9X for 7 consecutive 24hr periods
- Participants
- 177 vs 119
- Exposure
- 24hr movement composition and HR-pQCT bone parameters
- Womenn = 177
- Menn = 119
- Outcome
- Distal radius (DR) and tibia (DT) estimated failure load (HR-pQCT)
Methodological detailscompositional data analysis, compositional isotemporal substitution, sex-stratified multiple linear regression
- Compositional data analysis
- Compositional isotemporal substitution
- Sex-stratified multiple linear regression
Main finding
As reported in the abstract
DR and DT estimated failure load
- Higher proportions of MVPA (vs average sex-specific 24hr composition) associated with higher distal radius (DR) and DT failure load in women
Observational data: associations, not effects.
Further findings
| Outcome | Women | Men |
|---|---|---|
| Time in behaviours (average) | 90.2 min/day (6.3%) MVPA; 346.1 min/day (24.0%) LPA; 556.4 min/day (38.6%) inactivity; 447.4 min/day (31.1%) sleep | 93.6 min/day (6.5%) MVPA; 309.5 min/day (21.5%) LPA; 596.7 min/day (41.4%) inactivity; 440.2 min/day (30.6%) sleep |
Secondary HR-pQCT parameters (volumetric bone mineral density (vBMD), area, thickness)
- Higher MVPA proportions associated with higher DR trabecular (Tb).vBMD and Tb.Thickness (Th) in men
- Higher MVPA proportions associated with higher DR Tt.vBMD, cortical (Ct).Area (Ar), Ct.Th, and DT Ct.vBMD, Ct.Ar, Ct.Th in women
Isotemporal substitution
- Hypothetically displacing 10-60 min of inactivity for MVPA resulted in more favorable HR-pQCT parameters
Original publication
Twenty-four-hour movement composition is associated with HR-pQCT bone strength in older adults: The Study of Muscle, Mobility and Aging (SOMMA). J Bone Miner Res. Published 28 July 2026. doi:10.
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