If it were me, is use a dressage whip or line whip as an extension of my arm. I wouldn't go in any circles. I don't like my horse telling me when to go and where. Plus, I have no desire to make myself dizzy. I expect my horse to walk next to me with his shoulders no further ahead than my own shoulders. When I stop (and I do at random points to and from the field mostly, unless he's trying to be pushy on the lead elsewhere), I expect him to stop. If he doesn't, I make him step back to where I want him to be.
When he was younger, he used to fight me a lot. He's always been a dominant horse and doesn't like yielding control to me, but he does (most of the time). When I first started working with him on space and respect, I used the whips add an extension of my arm to tap his legs and make him move.
You're horse isn't respecting you when she does those things, and that's a big deal in the horse world. I treat my horse as his herd leader and maintain that with him at all times. The last thing I want is for him to realize that he's bigger and stronger than me. His ignorance is my bliss, lol. Sorry this wasn't a better post, but it's hard to type much on my phone.
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