For access to all of our training, gear, and race coverage, plus exclusive training plans, FinisherPix photos, event discounts, and GPS apps, sign up for Outside+.
An autopsy showed that multi-sport athlete Steve Larsen likely did not die of a heart attack, his brother told VeloNews Wednesday.
Mike Larsen said the autopsy ruled out a heart attack and a blood clot. The cause of death may have been viral or related to allergies, he said.
“The last few weeks he had been having serious troubles with his breathing,” Mike Larsen said. He said his brother had been seeing a doctor about his breathing troubles and had been unable to finish his workouts.