[header] How to halt a horse [title] Resist the horse's movement by tightening your abdominal muscles. [step] This will cause you to move less smoothly with the horse, and it will begin to sense resistance. Hold the core of your body in a rigid position to slow down the pace slightly. 
[substeps] Try to avoid tensing your back, as this can cause aches after riding. Focus on engaging the stomach muscles and keeping your tailbone pushed down to fight against the movement of the horse.