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

Hogan, whose real name was Terry Gene Bollea, died July 24 of acute myocardial infarction, commonly known as a heart attack, according to a copy of Hogan's cremation report obtained by ABC News through the Pinellas County Forensic Science Center.

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