I've been doing dressage for a while now and have really been diving into it recently. A friend of mine who does dressage very well/ competitively has been helping me, and she doesn't understand this either.
I always have a very difficult time keeping the irons correctly placed on my foot in dressage. They either slip all the way back to my heel or slide completely off. They are regular weighted irons and I ride in a correctly fitted Passier Grand Gilbert Dressage Saddle. I have my stirrups at the correct length for dressage but I just don't understand why I can't keep them. It's gotten to be such a pain and annoyance that I either take the stirrups off altogether or ride in my jumping saddle! Which is definitely not the goal. What could be keeping me from holding them right? I know that riding without is good but I also should be able to ride with them.
Also, I come from a jumping background: I'm accustomed to extra short stirrups. I am thinking maybe it is that I am so used to jumping length stirrups. I notice that a lot when I do rising trot. In dressage, rising trot is a lot different than jumping, for me, even on the same horse.
Also the saddle is quite big for me, but that really shouldn't interfere this much? Just a possibility though. I also notice the knee rolls block my knee sometimes from helping me use my weight correctly; my legs feel extremely "free" and "weak" as the rest of my body is locked in (At least from what I know from jumping). But isn't that normal for a dressage saddle??? Also I normally use a 16in seat, and this saddle is a 17.5in. I'll try to get some pictures soon.
This is getting frustrating... :/