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. Sprint interval ...

HIIT, or high-intensity interval training, is increasingly popular, and it provides plenty of benefits, from torching calories to increasing your VO2 max and overall athletic performance. SIT, or ...

If you have 10 minutes and space to lie down, you have everything you need to tackle this effective abs and obliques workout.

Push-ups, Sit-ups, squats, and running. These are some exercises people put on their priority list to get in shape and reach fitness goals. But sometimes, we lean towards exercises that are trending ...

The sit-up has dominated workout routines for decades, but fitness professionals increasingly question whether this familiar movement deserves its place in modern training programs. The issue isn’t ...