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.

More details about pro wrestling icon Hulk Hogan's death have been revealed, including his cause of death and a private battle with cancer. He died last week at age 71.