Plus, which move is more effective for strong abs.

Say goodbye to sit-ups and crunches, do this instead.

Here are the four exercises to try.

Want to run better? Stop doing sit-ups – here are five expert-recommended functional core movements to do instead.

Exercises like dead bugs help lengthen and strengthen the hip flexors in a controlled position, which improves form and can help offset the effects of sitting too much, adds Dickinson. Lie faceup, ...