The combination of passive and active movement is recommended in rehabilitation because it addresses both tissue healing and functional recovery at the same time. 

Passive movement – such as with a Knee CPM – helps maintain joint range of motion, improve circulation, reduce stiffness, and protect healing structures in the early stages after surgery or injury. 

However, passive motion alone does not restore strength or retain the nervous system. 

Active movement, on the other hand, rebuilds muscle strength, improves proprioception, and re-establishes motor control, but can be difficult or painful too early in recovery. 

When both are combined, patients receive guided, safe joint motion while also activating their muscles. This reduces fear, promotes better movement quality, and accelerates functional progress. 

Clinically, the combination bridges the gap between protection and performance, making recovery more efficient, more complete, and more sustainable.