Muscle strength changes differently when moving vs. holding still
Isometric muscle length-tension curves do not predict angle-torque curves of human wrist in continuous active movements.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When we move our wrist continuously, the way muscles get stronger or weaker doesn't follow the old rule from still-position tests. Also, the squiggly stretch of tiny muscle parts might not explain why this happens.
Surprising Findings
The classic length-tension relationship fails to predict dynamic torque during continuous wrist movement.
The isometric length-tension curve is a cornerstone of muscle physiology, taught in every textbook. It’s assumed to govern muscle function regardless of movement type — but this doesn’t hold during real motion.
Practical Takeaways
Don’t assume static strength tests reflect dynamic performance — especially in rehab or athletic training.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When we move our wrist continuously, the way muscles get stronger or weaker doesn't follow the old rule from still-position tests. Also, the squiggly stretch of tiny muscle parts might not explain why this happens.
Surprising Findings
The classic length-tension relationship fails to predict dynamic torque during continuous wrist movement.
The isometric length-tension curve is a cornerstone of muscle physiology, taught in every textbook. It’s assumed to govern muscle function regardless of movement type — but this doesn’t hold during real motion.
Practical Takeaways
Don’t assume static strength tests reflect dynamic performance — especially in rehab or athletic training.
Publication
Journal
Journal of biomechanics
Year
2000
Authors
D. Gillard, S. Yakovenko, T. Cameron, A. Prochazka
Related Content
Claims (2)
The squiggly pattern in how wrist muscles respond to movement might not be mainly due to uneven muscle fibers, which goes against a recent idea scientists had.
The way muscles are thought to work when they're still doesn't seem to match how they actually perform when moving your wrist continuously — what we know from static tests might not apply when things are in motion.