Massaging hot tub jets work to relax muscles and relieve pressure on nerves. Hydrotherapy in a hot tub can provide symptom relief to some people with arthritis and rheumatoid arthritis. Experts agree that muscle relaxation, decreased pain and stiffness and increased ease of performing daily activities and exercises are all potential benefits from heat therapies such as soaking in a hot tub.
Endorphins are natural painkillers for the body. Warm water stimulates their release. When the body is in warm water, blood vessels near the skin relax, allowing more blood to flow, bringing endorphins and nutrients to damaged cells.