Learn how muscle fatigue can disrupt your coordination and increase the risk of injuries. Stay informed to keep safe, whether in sports or daily life!
Published on October 30, 2025
Muscle fatigue alters contractile fibers and nerve control, disrupting proprioception, reflexes, and coordination.
γ discharge ↓ → delayed Ia afferents (+20%), slower myotatic reflex.
OTG become more sensitive, limiting force earlier. Protects tendons but ↓ concentric power.
Co-contraction ↑ around ankle/knee. Energy expenditure +10–15%. Sway ↑ 30% with slow oscillations.
Repeated jumps → delayed APA (+25 ms), ↓ extension, ↑ joint stress.
Ia+Ib ↓ → distorted efferent copy. Cerebellum overestimates force → under-corrections (+35% movement error).
Fatigue = weakened feedback, delayed reflexes, ↑ rigidity, biased effort perception. Rest or stimulation of sensors = essential.
Proprioception has become the most used and least understood word in the French-speaking movement field. And this ambiguity is not trivial. As long as it lasts, we prescribe in the fog. We see exercises. We don't see what they engage.
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