Lately I've been riding more horses that require a lot of leg to get (and keep) them going, and I've been really struggling. It's made me realize I don't use nearly enough leg on any horse, even the quicker ones... I find as soon as I try to put leg on, my heels pop up. As soon as I put my heels down, my leg comes off the horse's side. I have a tendancy of locking my ankles (I'm working on it, but it's a tough habit to break) and can keep leg on if my ankle is stiff and inflexible, but I can't maintain the correct position and squeeze.
Does anyone have suggestions on things I can work on to help me keep more leg on while still keeping my heels down? I've been trying to do extra no-stirrup work lately but both my horses are pretty green so they're not always the most cooperative as they still try to run from leg pressure instead of balancing themselves and moving correctly off it. Hopefully that all makes sense! Thanks.