Hi Dan ...

A common misconception that is made by many (including some trainers and athletes) is to train abs daily.

Abs are just like any other muscle group, and they need time to recover from hard training. Hit 'em hard with exercise, and then let the rest, recover, and grow (improve).

Decline sit-ups are a GREAT ab exercise ... I consider them to be an advanced exercise, which is why they are not in the beginner article, but if you can do them ... DO THEM! LOL. I include them in my an work from time to time and I love the burn I get from them.

Take care,
dan