Movies that permanently damaged actors' bodies

Hilary Swank in Million Dollar Baby (2004)
When you sign up for a boxing movie, you figure you'll end up with a lot of bruises. What you might not realize is that you'll have to drink raw eggs Rocky-style every morning for weeks on end. Hilary Swank was always fit and athletic (she was the Next Karate Kid, after all), but she said her training for Million Dollar Baby was much harder than anything else she'd ever done.