The determination and management of performance-limitation in sport horses is very challenging, especially within a short time period before an important competition. In this book experts disclose their experience on: -What do we know about the poor performance horse? -The gastrointestinal tract: medical, nutritional and surgical considerations.-Could it be the heart? -Could it be the muscles? -Monitoring orthopaedic health in competition horses.-Could it be the foot? -Could it be neurological? -Cases where physiotherapy helped to make a difference.-Could it be respiratory?