Biz Markie
Biz Markie

I walk. I do the treadmill; I walk around the mall. I do a little crunches with my stomach, not that much. Just enough to get the engine going cha-cha-cha-cha-cha-cha! Vroooommmmm.

Candace Cameron Bure
Candace Cameron Bure

I love doing air squats or jump squats, push-ups, jumping jacks, burpees, crunches - all the basic stuff, but it's all you need to do to keep it toned.

Chloe Grace Moretz
Chloe Grace Moretz

I did about 50 pull-ups and 1,000 crunches a day. Crazy.

Christopher Gorham
Christopher Gorham

I do abs every day: regular, weighted crunches and sit-ups every other day, then my obliques and my sides on the alternating day. So I'm working my core every day.

Gunnar Peterson
Gunnar Peterson

If you think you're going to do 100 crunches and a plank and burn away belly fat, you're not. Yes, you're going to make the area stronger, but it's not going to get rid of the fat. So do yourself a favor and, once and for all, let that idea go.

Jessica Ennis-Hill
Jessica Ennis-Hill

There was a massive poster of me down my road, right outside the chip shop. I was about to go in, but then I saw it and changed my mind. Me coming out with a bag of chips, while I'm up there doing crunches on the poster... well, it would not look good.

John Wall
John Wall

Crunches are my go-to. I do 100 crunches in the morning and at night to get myself going and get my body moving.

Kyle Hill
Kyle Hill

You can do crunches all day long, and you abs will indeed get bigger and stronger, but you will never see them. The only way to see the muscles you work so hard for is to lose weight globally - across your entire body.

Martina McBride
Martina McBride

I'm not fond of crunches or lunges, but I do them anyway because I do see results. For me it's about being fit and staying healthy more than anything else.

Nina Agdal
Nina Agdal

I think planks and crunches are an old-school simple move, but it's the way to go.