When there is a problem with back pain in your horse, the gluteus accessorius should be checked. This muscle works with the gluteus muscle in moving the hip and thigh. The stress point will be a knot felt near the pelvic crest. The horse will have a reaction when pressure is put on this stress point. Usually the rider will have noticed a shortened stride or discomfort in the hip and back. Since this is a stress point that seems to occur regularly during the competition season, it is one I always work on during a bodywork session, whether symptoms have developed or not.