How muscle size affects muscle function during everyday movement
Official title: Muscle Mass: a Critical but Missing Component in Muscle Modeling and Simulation
Funded at Harvard University · NIH-11413190 · Data updated 2026-11-12
This work adds real muscle size into computer models to better predict how muscles produce force during daily activities for people with movement problems.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Harvard University NIH-funded |
| Lab location | 1 site (Cambridge, United States) |
| Project start | July 6, 2023 |
| Project end | June 30, 2027 |
| Funding year | 2025 |
| Award (this year) | $78,367 |
| NIH project number | 3R01AR080797-03S1 |
| Project ID | NIH-11413190 on NIH RePORTER |
Who could benefit from this research
✓Could help
People with muscle-related mobility limitations or movement disorders (for example, cerebral palsy or other conditions that affect daily activities) would be the most relevant beneficiaries.
✕Less likely to help
Patients whose problems stem solely from non-muscular issues, like isolated joint damage or purely central nervous system conditions without muscle involvement, may not see direct benefit from these muscle-focused models.
What this research studies
Researchers will measure how muscle size and inactive muscle mass change muscle speed, force, and work using animals ranging from mice and rats to goats. They will record twitch timing, peak shortening velocity, and work in whole muscles and small fiber bundles to see how size, shape, and muscle bulging interact. Those experimental results will be used to build mass-sensitive muscle models and then run large computer simulations of human movement across many activity cycles. The goal is to make muscle-force predictions that better reflect everyday activities and could inform treatments for people with mobility challenges, such as cerebral palsy.
Why it matters
Potential benefit: If successful, clinicians could use more accurate muscle-force predictions to improve rehabilitation plans, surgical decisions, and assistive-device designs for people with movement limitations.
How similar studies have gone: Prior animal experiments and computational models have improved understanding of muscle mechanics, but explicitly adding inactive muscle mass across a wide size range is a novel approach with limited prior clinical testing.
Where this research is happening
-
Harvard University
Cambridge, United States Active
Researchers
- Principal investigator: Biewener, Andrew a — Harvard University
- Study coordinator: Biewener, Andrew a
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About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.