When you are sitting the canter, your hips are moving in a scooping motion; you're loosening your lower back to move with the horse, but also using your core to remain stable. When the stride is looong, your scoops are longer and flatter, as if you're drawing a long oval in the air with the motion of your hips. When the stride shortens and the horse has more suspension, that oval becomes more of a little circle (shorter scoop that scoops up higher). Try to sit your horse's rhythm by thinking about scooping smaller and taller when you're in a collected canter. :) Engage your core and thighs to keep yourself in the saddle. I hope this makes sense!
Last edited by existentialpony; 10-01-2013 at 01:58 AM.