People who exercise to extreme levels and appear healthy on the outside can, in fact, be quite unhealthy on the inside.

CLEARWATER, Fla. (AP) — Professional wrestler Hulk Hogan died of a heart attack last week, according to a Florida medical examiner’s report released Thursday. Hogan, whose real name was Terry Bollea, previously had leukemia and atrial fibrillation, an irregular heart rhythm, the report from the District Six Medical Examiner said.

Hulk Hogan, 71, was pronounced dead at a hospital less than 90 minutes after medics arrived at his home in Clearwater, Florida.