Muscle-Bone Relationship: Positive Association Between Appendicular Skeletal Muscle Mass and Bone Microarchitecture...

Area of Science:

• Gerontology
• Bone Biology
• Muscle Physiology

Background:

• Low estrogen levels in postmenopausal women negatively impact bone mineral density and microarchitecture, increasing osteoporosis risk.
• Hormonal changes associated with menopause can also lead to decreased muscle strength, mass, and physical performance.

Purpose of the Study:

• To investigate the relationship between sarcopenia components and bone microarchitecture in postmenopausal women.
• To explore the association between appendicular skeletal muscle mass index (ASMI) and bone microarchitecture.

Main Methods:

• A cross-sectional study involving 98 women aged 50 years and older.
• Measurements included anthropometrics, grip strength, physical performance (Timed Up and Go test), bone mineral density, and bone microarchitecture (trabecular bone score).
• Appendicular skeletal muscle mass index (ASMI) was estimated using dual-energy X-ray absorptiometry; associations were analyzed using multivariate linear regression.

Main Results:

• Appendicular skeletal muscle mass index (ASMI) showed a significant positive association with bone microarchitecture after adjusting for confounding factors (β = 0.047; p = 0.015).
• The study population was predominantly aged 60-69 years, non-White, with low education, and generally healthy lifestyle habits (active, non-smokers, non-drinkers).

Conclusions:

• A positive association exists between skeletal muscle mass and bone microarchitecture in postmenopausal women.
• Maintaining adequate muscle mass may be a crucial factor in preserving bone health and mitigating osteoporosis risk in this demographic.