Respecting horse work capacity limits is fundamental to welfare, as overwork causes physical damage, chronic pain and psychological distress that accumulates across training and competition careers.
Respecting horse work capacity welfare requires systems for objective monitoring of training load and recovery that go beyond subjective assessment of willingness to work. Horses cannot communicate directly when training demands exceed their capacity, and their compliance training often enables them to continue working despite pain and fatigue. Overwork accumulates physiological damage in tendons, joints and muscles that manifests as lameness and injury. Behavioral changes including reluctance to work and aggression during preparation are welfare communications that must be investigated rather than trained through. Technology enabling objective monitoring of heart rate, recovery time and movement quality provides tools for welfare-informed training management that complements subjective observation.