Crunches and situps can be great core exercises to tone the abs when performed correctly. Learn how to do a crunch the right ...

The reverse crunch is a simple core exercise that targets those hard-to-hit lower abs — without straining your neck and back.

The ab crunch. You can add weight if you want, or even extend the number of crunches you do. This is all about mind-muscle connection; minimal movement with big results. So concentrate on the ...

How many crunches can you do — and how does that stack up with others your age? That was the question posed by "FOX & Friends" on Monday, when fitness expert Joseph David challenged hosts Brian ...

Whereas crunches specifically target your ab muscles, sit-ups activate more muscles than just those in your core. Here are the main differences between the two exercises and how to do them properly.

The ab crunch. You can add weight if you want, or even extend the number of crunches you do. This is all about mind-muscle connection; minimal movement with big results. So concentrate on the ...

But crunches target just one of those muscle groups, so it's best to do your crunches as part of a larger, well-rounded core routine that works all of your abdominal muscles. Along with the abs ...