I am referring to bending around my inside leg from ear to tail, enough to see the inside eye and nostril. My horse finds this quite difficult to do and after doing a good bend for a couple of strides will sometimes then swing her hindquarters out. I have tried to counter this by keeping my outside leg behind the girth but it hasn't been working very well. Is it just lack of strength and supplenes? Yesterday I feel like a I did a lot of good work with her and will continue the exercise I was doing plus incorporate some of what you guys here have said. Yesterday I did walk/trot transitions on a circle, trot/halt/trot transitions on a circle, leg yielding, walk/halt/rein-back transitions, bending from side to side whilst halted. I have tried serpentines in the past and will continue working on these and I will also try the spiral exercise. I also lunged her before I rode with lots of changes of direction and also over a couple of poles.