[header] How to get a horse fit [title] Consult a veterinarian if the horse was injured. [step] If the horse is recovering from an injury, always consult a veterinarian before coming up with an exercise plan. The horse will likely need a period of stall rest, and may not be able to handle anything more strenuous than a gentle walk on a lead line for some time after that. 
[title] Decide whether to lunge or ride. [step] , or handling the horse from the ground with a long line, is a great way to start exercising an out-of-shape horse lightly.