Research
Hormonal
Voluntary muscle forces are the primary determinant of bone mass and structural adaptation, dominating over gravitational forces from body weight.
To build or maintain bone density, focus on exercises that generate high muscle forces (like resistance training) rather than just weight-bearing activities. Muscle contraction is the primary signal for bone strengthening, not just gravity.
GoodSupportsHIGH confidence
forces applied to bone are primarily the result of muscular contraction... ~70% of the bending moments on a bone are transmitted by muscle force rather than body weight.
Why this rating
Based on theoretical models, computational simulations, and a detailed case study of natural experiment, though lacking large-scale randomized controlled trials.
Source
Muscle Strength, Bone Mass, and Age-Related Bone Loss
David B. Burr · Journal of Bone and Mineral Research · 1997
DOI 10.1359/jbmr.1997.12.10.1547
narrative_reviewCited 506×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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