Woeful Canter Seat

[ahlam1399]

I?m struggling with my seat, especially in canter. My instructor says my seat is fine in walk and trot. However, when I canter I seem to lose it altogether. I move around a lot in the saddle and in videos it looks like my upper body rocks backwards and forwards. I also find that my lower leg position isn?t secure and I find it hard to give any useful leg aids & keep the horse going forwards. Feeling a bit frustrated with myself. I do have a wonky pelvis which I see an osteopath for & do Pilates. Any helpful advice appreciated.

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