Pack on upper-body muscle with this 21-15-9 bodyweight challenge – plus a scaled-down version

This classic 'Hero WOD' will light up your shoulders, chest and triceps – provided you can finish it ...

Why 21-15-9 Might be the Smartest Workout Format in Fitness – and How to Use it to Drive Muscle Growth

Here's why CrossFit's signature rep scheme has survived for decades ...

I tried a three-move workout from one of the 'fittest men on earth'

I tried a CrossFit Games champ’s three-move workout – it left me struggling to climb the stairs - FITNESS IN FOCUS: Two-time ...

The Best Calisthenics Exercises to Improve Longevity, According to an Exercise Scientist

It's all about mastering the fundamentals.
Women's Health

Build strength fast with 21-15-9 – the rep scheme that makes hard workouts feel more manageable

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 ...