This 25-minute HIIT session uses supersets to strengthen muscles all over the body while ramping up your heart rate and ...

Try this trainer-designed fitness test for adults over 60 using three standing exercises and practical benchmarks.

A Xenom weekend includes 10 events devised to test the participants’ strength (barbell lifts), speed (a three-kilometer run) ...

The science-backed blueprint for building a smarter workout.

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. I first tried the ...

Whether or not a late exercise session will mess with your sleep largely depends on its intensity.

Margot Robbie's trainer David Higgins shares her strength and reformer Pilates routine, including the 500-rep ab challenge ...

If you need a reminder of how incredibly popular the Insanity workout — a super-hard, DVD-based workout created by celebrity fitness trainer and choreographer Shaun T— was back in the late 2000s, how ...

If you're looking for a new exercise routine or a way to stay motivated with your physical activity, these are the best ...

In cities across the country, underground calisthenics battles are pushing elite athletes to their limits ...