Learning and teaching your horse some dressage movements such as shoulder-in, turn on the haunches, rein back, and haunches-in will develop your horse's potential to better compete in reining, jumping, english and western pleasure, barrels, or to just be a more enjoyable ride on the trail. Dressage will even benefit the race horse, keeping him strong through his entire body and helping to keep those precious legs from injury.
By training a horse in dressage basics you can produce an equine partner that is supple, obedient, more beautiful, healthier, and a joy to ride.