It seems that lately I have been having cramps in both of my hips while riding my spyder. This just started and I would like to know if anyone has ever experienced this problem. I am 75 years old and I have the spyder for three years now. I had my left knee replaced twice and am due for the right knee soon. I don't want to go to a Doctor because they send you for unneccesary tests and then tell you there is nothing wrong.