Watsu therapy is a unique aquatic bodywork treatment in very warm water that promotes relaxation, pain relief, and muscle recovery. It combines elements of massage, joint mobilization, and shiatsu. The receiver is supported by the practitioner, face out of the water, with floats on the legs for additional buoyancy.

It is a popular spa treatment offering deep relaxation and stress relief.

It is, however, also used in hospital settings for treating mental health conditions, physical rehabilitation for chronic pain management, including arthritis and fibromyalgia, and for helping with neurological conditions to manage spasticity and improve mobility in patients with stroke damage. Watsu also supports physiotheraphy departments to assist in injury recovery.

Watsu is often used by elite athletes for quick muscle recovery after intense competition. Novak Djokovic is a big fan of Watsu.