What symptom may indicate exertional rhabdomyolysis?

The presence of extremely dark-colored urine is a key symptom that may indicate exertional rhabdomyolysis. This condition occurs when there is significant muscle breakdown, leading to the release of myoglobin into the bloodstream. Myoglobin is a protein found in muscle tissue, and when it is released in large quantities, it can be filtered by the kidneys, causing urine to take on a dark, tea-colored appearance. This dark coloration can be a critical sign that alerts individuals to seek medical attention, as untreated rhabdomyolysis can lead to serious complications, including kidney damage.

In contrast, while severe muscle cramps can occur with intense exercise, they are not specific to rhabdomyolysis. Fever and chills may suggest an infection or other illness rather than muscle breakdown. Chest pain, although concerning, is more indicative of cardiovascular issues rather than directly related to rhabdomyolysis. Therefore, the distinctive symptom of extremely dark-colored urine plays a crucial role in identifying this potentially life-threatening condition.