Muscle: Confessions of an Unlikely Bodybuilder

Muscle: Confessions of an Unlikely Bodybuilder is a 1991 non-fiction book by Samuel Wilson Fussell. It describes Fussell's time as a bodybuilder over four years, during which he takes steroids.

Publishers Weekly described it as "A book of minor significance, but enjoyable reading."

Camille Paglia wrote, "Fussell has a great eye for eccentric characters and a great ear for the crackling vernacular. But too little time has passed for him to have psychological perspective on his profoundly self-altering experience.