Warm water increases blood flow to joints, plus the heat increases the flexibility of the joints. And because of buoyancy, there is less force on the joint, so that one can exercise without pain.  -   John Klippel     Quotes
Warm water increases blood flow to joints, plus the heat increases the flexibility of the joints. And because of buoyancy, there is less force on the joint, so that one can exercise without pain. John Klippel