Fitness fads may come and go, but there's one thing that's always in style: a strong core. Whether you're a Hyrox addict, a Pilates princess or a running regular, maintaining a stable, functional core ...

• Sit-ups target your abdominal muscles, back muscles, and hip flexors, while crunches only target your abdominal muscles. • Neither sit-ups nor crunches alone burn abdominal fat. Overall activity and ...

While ab exercises like the situp and crunch tend to get all the glory, there are plenty of other moves that work the region just as effectively. And there is something to be said for adding variety ...