Works different muscles, don't it? I ride 2 horses probably 6 days a week, I also work out, which includes plyometrics (jumping), cardio, resistance & kickboxing. You would think that all muscles would be engaged & used, nope. When I go to my instructor's for lessons, she finds ways to fatigue my seat & legs, like the whole lesson with no stirrups and dropping the bridle, going around cones & poles like that, very effective. Even the horse hides when he sees the trailer being hooked up in the morning, he knows what's in store for us!