Recurrent exertional rhabdomyolysis is a significant welfare and performance issue in racehorses. Dietary and management approaches reduce frequency and severity of episodes.
RER horses experience acute muscle pain during episodes that prevent normal exercise and cause distress. Repeated episodes cause cumulative muscle damage and can lead to career termination. The link between temperament, exercise inconsistency and diet makes RER a multifactorial welfare challenge. Horses with RER benefit from daily consistent exercise, a calm stable environment, low-starch feed and careful management during rest days. Anti-anxiety measures including consistent routines and turnout reduce nervous tension that predisposes to episodes.