The death of 24-year-old marathon runner Rachel Apa after collapsing during the New York City Marathon has raised concerns about the risks associated with extreme endurance exercise. Apa was running her first marathon on November 1, 2026, when she collapsed near the finish line and was taken to hospital, where she later died. According to reports, her father told media outlets that doctors attributed her death to rhabdomyolysis, a rare but potentially life-threatening condition involving severe muscle breakdown. However, the medical examiner’s investigation into her death was still ongoing in reports published on November 3.  Rhabdomyolysis occurs when damaged muscle cells release proteins and electrolytes into the bloodstream. These substances can overwhelm the kidneys and cause serious complications, including acute kidney injury. The condition can also affect the heart. Muscle breakdown may release potassium into the bloodstream, potentially causing dangerous electrolyte disturbances and abnormal heart rhythms, known as arrhythmias.  Symptoms may appear hours or even days after the initial muscle injury. Rhabdomyolysis cannot be reliably diagnosed through symptoms alone and requires medical evaluation and blood testing. Anyone experiencing these warning signs after strenuous exercise should seek immediate medical attention. Early diagnosis and treatment can reduce the risk of serious complications. Marathon preparation should involve gradually increasing training intensity, allowing adequate recovery and following appropriate medical guidance. Extreme muscle pain, weakness or dark urine after exercise should never be dismissed as ordinary post-workout soreness.

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