Strange pain from spinning

[Catrin]

Two weeks ago we got a few new bikes for our spinning classes. These are smaller bikes than the others, and suit me better. Last night, however, there was some strange muscular pain during class. I am trying to figure out what caused it.

The pain was primarily when seated - and the area is difficult to describe. It was in the area of my right inner thigh up where the leg/hip/groin all connect. It was rather deep and was a steady dull pain rather than a cramp. It stopped a few seconds during a standing run or climb - anything that took me out of the seat.

The seats on these new bikes are pear-shaped, but smaller than on the other bikes. I felt like I was constantly fighting to keep from sliding forward, but the seat appeared to be adjusted properly. Any thoughts about what might have caused this? This was totally different than anything I've felt on bike or spinner before. Today I meet with my trainer and I think that I will just measure the seat to see how small it actually is.