Are you a crunch fanatic with no six-pack to prove it? Or maybe you put in an hour on the elliptical every day, but the scale still hasn't budged. If either of these scenarios sounds familiar, one thing is clear: Your workout isn't working. I recently sat down with Diane Mizota, host of Yahoo.com's Bikini 101, to talk about the most common workout mistakes—and what you can do to prevent them. Click HERE to check out the segment!