I too have this problem! Last year I decided to take up running, and everything was going well and then, Hip pain. The doctor decided it was bursitis and gave me a shot in the hip (wouldn't refer me to PT!). It wasn't very helpful and I just had to stop. I have finally decided to try again and now hip pain right away in the other hip. I guess running will not be for me. It was very frustrating but I don't want to end up with permanent hip pain. On the other hand I have never had any problem with hip pain while biking!