this is my favorite therapy, the water must be at least 93 degrees. you weigh half your weight in water- so it is such a relief to be somewhat weightless . I love it. However use caution- I overdid- and paid dearly with a major 3 day flare up. Like everything else you have to begin slowly. too much can be almost as bad as nothing at all.IF you take it easy you can go more freequently which is the goal. enjoy.