Fact checked by Nick Blackmer Planks are better at building core strength because they engage the deepest layer of your ab muscles.Crunches mainly target the surface abs—the “six-pack” muscles—and are ...

While exercises like sit-ups and crunches work the rectus abdominis, or "six-pack" muscles, this simple-looking exercise ...

YOU PROBABLY THINK you know how to do a plank. The ab training staple is relatively simple, after all—boiled down to the basics, all you need to do is get down on the ground and hold in place.

No matter how frequently you lift, abs exercises have a way of keeping even the most fit people humble. By isolating the core ...

Chair core exercises after 60: Trainer-approved moves to build core strength without floor planks, crunches, or back strain.

Before you chuck that dusty old stability ball from your garage into the donation pile, hear us out. You might think they’re ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Do you want a strong ...

Why reverse planks might be the most underrated core move ...

Dead bugs are one of the best ab workouts, according to personal trainer Brittany Noelle. Noelle said many people perform ab exercises incorrectly, which can cause injury. She said sit-ups are one of ...

Crunches and sit-ups aren't the only way to build strong abs. Underrated exercises like planks and flutter kicks are effective, low-impact alternatives. Doing different core exercises also helps add ...

The model shared what she did to get her core strength back after giving birth to her third baby.