The idea of soaking in hot tubs is nothing new. The ancient Greeks and Romans recognized the healing powers of warm water. Today, many people, especially those with arthritis, appreciate a spa's ability to help them relax and feel better.

"The heat from the warm water makes joint movement in the person with arthritis much easier," says Washington, DC, rheumatologist Dr. Jack Klippel, president and CEO of the Arthritis Foundation. "We consider it an important component of therapy."

Sitting in a heated spa (hot tub) may improve circulation. As your body temperature rises, blood vessels dilate, which enhances blood flow and relaxes body tissues. Spa jets massage sore areas, releasing tight muscles, and relieving pain.

"More blood flowing to the joint makes it easier for you to move the joint. The massage causes the muscles to relax," Klippel says. "And having relaxed muscles allows for freer movement."

Check with your doctor before using a spa, especially if you are pregnant or have a condition that might prevent you from safely using the spa. Soak safely by doing the following:

  • Maintaining the water temperature between 98°F and 104°F
  • Gradually building up the amount of time spent in the water
  • Staying in the tub for 15 minutes or less
  • Avoiding alcoholic beverages or taking pain medicine or muscle relaxers before or during spa use
  • Getting out if you start to feel lightheaded or nauseous
  • The National Spa and Pool Institute recommends not soaking after a heavy meal

Most hot tubs provide enough space to stretch small muscle groups supporting hands, wrists, knees, ankles, and toes. Some swim spas are even deep enough to do aerobic routines and work large muscle groups. You can even get spas that come equipped with an underwater treadmill. If exercising in a swim spa, be sure to lower the temperature to between 83°F and 88°F.