October 27, 2051
at the age of 78 years old.

Heart Attack 25%
Cancer 22%
Alien Abduction 8%
Auto-Erotic Asphyxiantion 8%
Auto-Fellatio 6%

(If I can perform fellatio on myself at age 78 then I will be in DAMN good shape! Eat your heart out, Jack Lalane!)