You'll need better moves to build a functional core. Here’s how you can upgrade your workouts.

Exercises like weighed sit-ups and lying leg raises can help build defined abs, physique coach Cliff Wilson said. You should train the abs like you train any other muscle by adding resistance, he said ...

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. Curls are the classic ...