Everyone knows it’s really hard, bordering on impossible, to out exercise a bad diet. You might be able to out exercise a bad diet if all you care about is abs and race times and make it your job, but eventually your poor health will catch up with you. That doesn’t mean exercise doesn’t matter for weight loss, though. It does. (This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Tina Leaman)