American actress Linda Hamilton surprised everyone in 1991 when she debuted a ripped physique for her role in the sci-fi thriller "Terminator 2."
To play a character who can convincingly go up against a cyborg assassin from the future, Hamilton says she "ran, lifted weights, trampolined, aerobicized and bicycled – three hours a day, six days a week."
When production kicked off, Hamilton was strong enough to bench press 85 pounds, run eight miles, and physically perform many of her own stunts for the film.
"Now I'm stronger, I survive on four hours of sleep a night, and I'm much more confident," she told Prevue magazine.