Pilates, riding and training horses have an important element in common, each requires that the core of the body be stabilised in order to generate and control the energy from the centre into free flowing movements of the rest of the body.
Pilates helps to control the centre of the body so as to make the other parts of the body more effective.
Pilates helps the rider to lengthen and use the spine, it also corrects all mis-alignment of muscles.
In a rider, if one inner thigh muscle is weaker than the other the horse will fell this and this in turn could affect their left or right turns.
Pilates above all will strengthen your back, your core muscles and make you a stronger rider.