Hydrotherapy, or acquatic/pool rehabilitation, can be beneficial - through gravity reduction, muscle relaxation induced by heated water and enhanced proprioceptive feedback derived from the water-skin contact - during the rehabilitative procress, possibly before and/or after surgery, in case of:
It's not necessary being able to swim and is indicated at any age - plus, the Swiss health insurances (Cassa Malati) cover it as water physical therapy.