Pain behind the knee
The cause: Riding in clipless pedals “pulls the [knee] joint apart” on the upswing portion of a pedal stroke, says Running Away Multisport fitter Anne Barnes. If the saddle is too high, this stress becomes greater and “the knee is what’s going to complain first.”
The fix: Get a good bike fit right away to prevent knee problems by nailing your ideal seat height. If the back or center of the knee hurts, the saddle may be too high.