Bottom Line: This is my favorite exercise method because it works.
I ran marathons, took a zillion spin classes and still suffered from ultra muscular, chunky thighs. There's nothing wrong with ultra muscular, chunky thighs, but it wasn't exactly the, uh, aesthetic I was going for. Call it a celebrity fitness craze with a cult following-- it's probably all of those things....But it works for me.
Check out the hype here.