Runner Rachel Apa dies of rhabdomyolysis after NYC Marathon collapse

Key Clinical Takeaways:

• Rhabdomyolysis occurs when skeletal muscle breaks down and releases its contents into the bloodstream.
• Intense physical exertion is a known trigger, but the condition can also result from crush injuries, heat stroke, prolonged immobilization, and certain medications.
• Symptoms that require urgent medical evaluation include severe muscle pain, marked weakness, swelling, and dark-colored urine.

Why Did Rachel Apa Collapse at the New York City Marathon?

On Sunday, Rachel Apa collapsed two miles before completing the New York City Marathon. Transported to a hospital, she subsequently died. Her father, Steve Apa, told the New York Times that the cause of death was rhabdomyolysis, though the medical examiner’s office investigation remains ongoing.

The tragedy has amplified public interest in rhabdo, a rare condition that has gained visibility on social media platforms following intense workouts, particularly cycling classes. While these online accounts often sound alarming, the condition itself remains relatively rare among the general exercising population.

What Exactly Happens in the Body During Rhabdo?

Rhabdomyolysis happens when damaged skeletal muscle tissue breaks down rapidly. This breakdown causes muscle cell contents to spill into the bloodstream. The resulting flood of proteins and electrolytes can trigger dangerous imbalances and kidney injury, particularly if the individual is dehydrated, according to Robert Glatter, an emergency room doctor and assistant professor of emergency medicine at Lenox Hill Hospital.

While heavy exercise frequently makes headlines as a trigger, physical exertion is only one potential cause. Dr. Glatter notes that rhabdo can also follow crush injuries, seizures, prolonged periods of immobilization, heat stroke, severe infections, specific drugs or toxins, metabolic abnormalities, and rare inherited muscle disorders.

Can Anyone Develop Exertional Rhabdomyolysis?

Exercise-related rhabdo typically strikes when an individual abruptly tackles an unusually difficult or repetitive workout involving large muscle groups. This risk climbs significantly during eccentric exercises, where muscles contract while lengthening, or when tackling movements that are completely unfamiliar.

Dr. Glatter explains that the underlying problem is rarely just that a workout was hard. Instead, the issue is that the intensity or volume far outstripped what the person’s muscles were conditioned to handle. High-repetition squats, lunges, downhill running, and intense cycling sessions can all serve as triggers when approached without adequate preparation.

Although many recent social media accounts of the condition feature women, unaccustomed high-intensity exercise can overwhelm muscles regardless of sex. Studies demonstrate generally higher rates of exertional rhabdo in men, meaning viral narratives do not accurately reflect overall demographic vulnerability.

What Warning Signs Should Exercisers Watch For?

Symptoms often manifest as severe muscle pain that feels dramatically out of proportion to standard post-workout soreness. Affected individuals may also notice dark-colored urine, localized swelling, profound weakness, and difficulty moving the impacted muscles.

Additional warning signs include dizziness, fainting, confusion, persistent vomiting, or a general feeling of severe illness. Dr. Glatter emphasizes that anyone who develops severe or rapidly worsening muscle pain and swelling after a strenuous workout—especially when paired with dark urine or decreased urination—needs urgent medical evaluation.

Symptoms can start while the workout is still underway. Athletes might experience unusual heaviness, sudden weakness, severe fatigue, or an unexpected drop in pace that should otherwise feel manageable.

Is Rhabdo Becoming More Frequent in Fitness Classes?

Determining whether the condition is genuinely rising proves complicated due to mild cases that go undiagnosed. However, a 2022 analysis published in The Physician and Sportsmedicine examined emergency department data covering 2000 through 2019, estimated more than 40,000 cases of exertional rhabdomyolysis, and found an increase over that period.

Dr. Glatter attributes part of this shift to changes in fitness culture. The proliferation of high-intensity interval training, cycling studios, and CrossFit-style gyms exposes participants to unfamiliar movement patterns at high intensities. When heat, humidity, dehydration, recent viral illness, or inadequate recovery mix with rapid increases in workload, the risk profile changes.

Even well-trained athletes are not immune. In conditioned individuals, rhabdo often acts as a multiple-hit phenomenon, where concurrent physiological stresses—such as extreme heat, electrolyte imbalances, or certain medications—lower the injury threshold. Underlying genetic traits, such as sickle cell trait, can also predispose a healthy athlete to rhabdo.

To reduce risk, experts recommend starting at a manageable level, building volume and intensity gradually, and maintaining proper hydration. Anyone experiencing severe symptoms should seek care promptly from a qualified medical professional or emergency facility.

Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.