This is accomplished by pre-stretching prior to mounting the horse, and starting the rider off on a narrow horse, gradually working to wider and wider horses. Gravity helps to stretch the muscles in front of the leg as the rider sits on the horse without stirrups. Riding with stirrups with heels level or down helps to stretch the heel cords and calf muscles. Stomach and back muscles are stretched as the rider is encouraged to maintain an upright posture against the movement of the horse. Arm and hand muscles are stretched as part of routine exercises on the horse and by the act of holding and using the reins.
Spasticity is reduced by the rhythmic motion of the horse.
The warmth of the horse may aid in relaxation, especially of the legs. Sitting astride a horse helps to break up extensor spasms of the lower limbs. Holding the reins helps to break flexor spasm patterns of the upper limbs. Many of the developmental vaulting positions are also designed to break up or reduce spasticity. Fatigue also helps to decrease spasticity by producing relaxation.