Core movesare perhaps some of the most popular exercises to integrate into really any workout routine.

However, one that seems to have pretty mixed reviews is the infamous crunch.

Looking to build an abs routine andadd crunchesto the mix?

Merrell Readman

How to do crunches.

Demonstrated by Mindy Lai.

Form tips.

Modifications & variations.

Tabletop crunches are going to be the next level up from crunches.

Tabletop Crunches

Demonstrated by Jessica Aronoff.

Bicycle Crunches

Demonstrated by Lai.

Side Plank Crunches

Demonstrated by Katie Dunlop.

Add it to your routine.