It is always the basic, practical questions to which there are never any good answers. I have never seen a study looking at this in any scientific way. If I had to guess, I would think the hot water together with enough room to move the joints would be of most benefit. But then again, a water massage sounds pretty good about now.
About Alan Matsumoto, M.D.
Part-time Faculty, Division of Rheumatology
Johns Hopkins University