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Updated: Jun 6, 2026
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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Exercise loading and cortical bone distribution at the tibial shaft.
T Rantalainen1, R Nikander, R M Daly
1Department of Mechanical Engineering, Lappeenranta University of Technology, Finland. timo.j.rantalainen@jyu.fi
Bone
|December 3, 2010
Summary
Exercise type does not change how bone density is distributed within the tibia. However, high-impact and odd-impact sports were linked to slightly lower overall cortical bone density in premenopausal women.
Area of Science:
- Orthopedics
- Sports Medicine
- Bone Physiology
Background:
- Cortical bone density (vBMD) varies across bone cross-sections and along their length.
- The influence of mechanical loading from different types of physical activity on bone density distribution remains unclear.
- Understanding these relationships is crucial for bone health and injury prevention strategies.
Purpose of the Study:
- To investigate if varying exercise loads modulate the radial and polar distribution of cortical bone mass.
- To compare cortical bone mass distribution in premenopausal women across different sports categories and leisure activity.
- To analyze bone cross-sections at the tibial mid-diaphysis using peripheral quantitative computed tomography (pQCT).
Main Methods:
- 221 premenopausal women (aged 17-40) were categorized by sport type: high impact, odd impact, high magnitude, repetitive low impact, repetitive non-impact, and leisure activity (controls).
- pQCT was used to assess tibial mid-diaphyseal cross-sections.
- Radial (through the cortex) and polar (around the center of mass) vBMD distributions were analyzed in defined cortical divisions and sectors. Age was included as a covariate in MANCOVA.
Main Results:
- No significant interaction was found between exercise groups and cortical divisions/sectors for either radial or polar vBMD distribution.
- Mean vBMD differed significantly between groups (P<0.001).
- High-impact and odd-impact groups showed 1.2–2.6% lower mean vBMD than controls. Repetitive low-impact and high-magnitude groups also exhibited slightly lower vBMD in specific regions.
Conclusions:
- Exercise loading does not appear to modulate the radial and polar distribution patterns of cortical bone vBMD in the tibial mid-shaft.
- However, the overall mean cortical bone vBMD is slightly affected by the type of physical activity undertaken.
- These findings suggest that while loading may not alter bone density distribution, it can influence overall bone mass levels.
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