Abs is the shortened term for your abdominal or core muscles. The ab muscles are located in the trunk of your body under the chest and above your pelvis. Doing ab workouts can directly impact nearly ...

Plus, which move is more effective for strong abs.

You can build stronger core muscles while strengthening and lengthening your hips with this five-move routine.

Here's why crunches are so good for your overall health.

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. It’s kind of strange, ...

Hafthor "The Mountain" Björnsson has lost 121lbs and now has shredded abs. Core training is particularly important for him right now as he embarks on a boxing career. Björnsson told Insider he does ...