he legs are the primary driving and straightening aid. The pushing influence of the legs, isolated in the calves, are used most effectively nearby the girth. The rider must learn to feel and push the horse with the calves, likewise young horses must be taught to listen to the pushing influence of the calves. Only a horse which responds properly to the forward driving influence of the calves can come over his back. Remember always that the forward pushing aid must always exceed the halting aid of the reins and seat in order for the horse to be truly over the back.

The forward pushing influence of the leg is crucial in straightening the horse and maintenance of the horse's rhythm as the horse learns collection. As the seat gives the half halt, the pushing influence of the leg at the same moment brings the hind legs under the horse. The legs are also important in the timing and execution of exercises such as shoulder-in, travers, and flying changes. The inside leg drives forward while the outside leg quietly fulfills a governing role.