A Hyrox athlete shares the exact race-day moves to build endurance without burning out.

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. While plenty of ...

The best CrossFit exercises for beginners include air squats, deadlifts, and burpees. You don't need a specific gym to do them, either, as many can be done wherever there's equipment. CrossFit offers ...

Crunches are a familiar movement that you can easily do from the comfort of your own home or in a gym setting. This quick, 15-minute (or less!) series can be completed with minimal to no equipment.

Exercise is one of the most powerful tools for supporting health at any age. From short-term benefits like improved mood, energy and focus to long-term perks such as better heart health, stronger ...

If you tried to imagine the perfect gym teacher, you’d probably come up with someone a lot like Hampton Liu. He’s a gentle, friendly guy who spends most of his time trying to figure out how to make ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. "Right to the core," "core values," and "hardcore." These little idioms highlight just how vital the concept of "core" is in our lives ...