What is the difference between a dressage trainer and a dressage coach?

The terms trainer and coach are used somewhat interchangeably in the dressage world but can describe meaningfully different roles whose distinction is worth understanding when selecting who you work with. A dressage trainer primarily works with horses — training horses to specific levels, starting young horses, developing movements, and producing the gymnasticized, educated horse that competition and correct riding require. Trainers may also teach riders, but their primary expertise and primary service is horse training rather than rider development. A dressage coach primarily works with riders — developing the rider's position, feel, timing, and tactical knowledge — and may or may not have significant horse training expertise separate from their rider-coaching skills. In practice, many dressage professionals function as both trainer and coach simultaneously, developing both the horse's training and the rider's skills within the same lesson structure. The distinction becomes practically important when a rider needs to decide what kind of help they most need: a rider with a well-trained horse who needs to develop their own skills to match their horse's training would benefit more from a coach focused on rider development; a rider with a talented but underdeveloped horse who already rides well would benefit more from a trainer who can develop the horse's training. At the higher levels, rider coaching often becomes more specialized — competitive riders working at FEI levels may work with a trainer for horse development and a separate coach for competitive preparation and tactical advice — but this level of specialization is unusual at the lower and middle levels where the same professional typically serves both functions.