Equine exertional rhabdomyolysis is a condition characterized by the breakdown of muscle tissue in horses, specifically occurring during or after intense exercise or physical exertion. Commonly known as tying-up, this syndrome results in muscle pain, stiffness, and overall discomfort in affected horses.
The primary cause of equine exertional rhabdomyolysis is still not fully understood but is believed to be multifactorial. Factors contributing to its development include poor conditioning, inadequate warm-up or cool-down, sudden changes in exercise intensity, dietary imbalances, genetic predisposition, and underlying metabolic disorders.
When a horse experiences an episode of exertional rhabdomyolysis, the intense exercise causes muscle fibers to rupture, releasing their contents into the bloodstream. This release results in an overload of electrolytes, enzymes, and waste products, such as myoglobin, which can cause further damage to the kidneys and lead to potentially life-threatening complications.
Symptoms of equine exertional rhabdomyolysis include muscle stiffness, tremors, sweating, reluctance to move, and an elevated heart and respiratory rate. In severe cases, horses may exhibit signs of colic, dark urine due to myoglobinuria (presence of myoglobin in urine), and even collapse.
Treatment involves addressing the underlying cause while providing supportive care. Affected horses are typically given adequate rest, pain-relieving medications, and intravenous fluids to prevent dehydration and support kidney function. Additionally, implementing gradual exercise programs, revising diet plans, and managing stressors can help prevent future episodes.
The prognosis for horses with exertional rhabdomyolysis varies depending on the severity of the condition, the underlying cause, and the promptness of treatment. With proper management and preventive measures, the long-term prognosis for affected
