Abdominal Machines and Exercises

I don't have a lot of experience with abdominal machines besides commercial equipment, but I can tell you what I do know. In my opinion, the most effective abdominal equipment out there comes in the form of either a crunch machine with adjustable weight, or from an assisted incline bench. Both exercises need to be done in moderation and with the appropriate weight settings, but I know for sure, over time, they get the job done right.