Ah, sitting trot – the nemesis of so many riders of all ages, levels, and disciplines! In order to develop a balanced, independent seat that does not hinder the horse, but rather allows him to move with maximum ease and efficiency, the rider needs to have flexibility and suppleness through the legs, hips, and lumbar spine (lower back), stability in the pelvis, and strength in the core. These qualities allow the rider to maintain an upright posture that is firm and supple, not rigid, as riding is dynamic and requires a constant repetitive series of muscle contractions.