Mechanistic Uncertainty

Uncertainty should be preserved when discussing mechanisms behind rapid range-of-motion improvements. Clinicians should avoid claiming certainty about one mechanism because they are not measuring enough variables to know exactly why someone improves quickly. It is uncertain whether joint fluid dynamics fully explain rapid range-of-motion changes during movement interventions. Rapid range-of-motion changes are likely influenced by multiple factors rather than only local joint mechanics. Possible contributors to rapid improvements include local joint changes, neurological changes, and interactions across body systems.