Having astrong coreisn’t just about having a six-pack, though that can be a nice side effect.

That means that pretty much all other physical activities are easier to do when you have a strong core.

They’re both great options, and both have their celebrity fans.

Woman doing sit-ups

Hailee Steinfeldtold Kelly Clarkson on"The Kelly Clarkson Show"that she does 3,000 crunches per day.

AndMaria Menounosswears by daily sit-ups.

“I have this one little routine that anyone can get through,” she explained toHealth.

Woman doing crunches

But while sit-ups andcrunchesmay seem like basically the same thing, they’re not.

Here are the important distinctions.

But overall, crunches are a more isolated exercise compared to the sit-up.

Every body is different, so choose your sit-up or crunch based on what your body can safely do.