Khloe Kardashian strips down for Women's Health magazine (photos)

The 31 year old reality star covered the new issue of Women's Health magazine in nothing but an unbuttoned top and panties as she revealed her motivations for getting in shape.

"'The first 45 days you're like, "F**k this s**t." You're exhausted, you're sore, and I actually felt fatter because I was swollen. But If you keep going, you're eventually like, "Wow, is that an indentation on my arm? Yeah, it's a revenge body. But it's just as much for all my critics who called me "the fat one" for my entire existence.'