I've been told by 4 surgeons who looked at my x-rays that I have Osteoarthritis and needed a THR. I'm scheduled to have my surgery next month. I don't have constant pain but am starting to limp and have some difficulty sleeping. I used to play racquetball 3 or 4 times a week but had to stop. I currently work out with weights and also do the elliptical machine for about 20 minutes 4 times a week. The question I have is should I stop using the elliptical machine and switch to swimming and biking? Is the elliptical machine bad for someone in my condition? Could it be making things worse?