“Repeating the same movements every session can lead to boredom and plateaus,” Mosca says. “Mixing in playful elements—like ...

I’ve always been partial to Dunbar, the character in Catch-22 who seeks out boredom and discomfort in order to make time pass more slowly, thus effectively prolonging his life. It’s a sensation that’s ...

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. Rest days are an ...

If you want to boost your cardio fitness, you’ve got two ways to level up your workouts: push harder or faster, or keep at it for longer. Each option comes with its own challenges. The first can ...

We all want simple workouts that deliver results, and that's why the 21-15-9 format has become a staple in high-intensity functional fitness. Originally a CrossFit workout, it involves completing one ...