I actually injured this area using a HealthRider. I was enjoying it so much that I was using it almost an hour a day. No pain at all. Then one day, I realized that the seam on my jeans felt funny in that area. I did associate it with the movement of the HealthRider, so I stopped immediately.
That was about 5 1/2 years ago. Cortisone helped for 10 months, then never helped again. The religious use of a donut helped and I was relatively pain free for a few years, but it has come back with a vengeance and is now worse than before.