I recently switched to a new trainer so I can get some experience on different horses, and I've noticed I've picked up some hidden habits that don't come out when I ride Roxy. The worst of which is probably pinching with my knees. I'm generally fine on the flat, just need a reminder every once in a while, but when as I was going over the pictures and videos from my lesson today I noticed I'm really pinching over the fences. I've never really done this on Roxy (as far as I know), so I'm a bit confused as to why I'm doing it on other horses... Anyway, do you guys have any suggestions on how to prevent myself from pinching? I've been trying to just really open my knees before the jump but is there anything else I can try?