The last ten to fifteen minutes of every ride should consist of walking on a long or loose rein to allow the horse to relax, stretch his muscles, and, if he is winded from the exercise, catch his breath. This may be all the cool-down the average horse requires in order to physically recover from moderate exercise on a cool to warmish day. But intense workouts can strain muscles, ligaments, and tendons, and when coupled with soaring summer temperatures can cause your horse’s body temperature to skyrocket.