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 ...

If you’re short on time but want a really effective workout without needing a ton of equipment, then high-intensity interval training (HIIT) is ideal. If you’re not familiar with this style of ...

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.

Join instructors Lee Jimenez and Tiffany Ragozzino for an invigorating 20-minute kettlebell cardio workout. Lee and Tiffany keep the tempo up and the kettlebell central to a series of exercises that ...

We lead busy lives, and between school, work or spending time with family, it can be tricky to make time for working out, especially when first establishing a regular exercise routine. But keep this ...

Hear me out: Kickboxing is maybe one of the best all-purpose workouts out there. Want to shake off stress? Kickboxing. Boost your energy? Kickboxing. Fire up your full-body with a functional workout ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Forget the treadmill — if you only use gym machines for cardio, you're missing out on some serious ...

A beginner athlete in the newly offered tactical fitness class, OnRamp, adds a 10-pound weight to a barbell at the McAdoo Fitness Center at Minot Air Force Base, N.D., Feb. 4, 2016. (Airman 1st Class ...