I have gotten quite a few questions about the ab challenge (which begins TODAY) so in no particular order here goes: Do they mean full out sit-ups? The little diagram at the bottom of the challenge page (when it appears) shows knees completely bent like this: (but without the incline) So should I secure my feet under something or have someone hold my feet in … [Read more...] about Welcome to the 30 Day Ab Challenge. YES. It Begins TODAY