These four movements work multiple muscle groups and in various planes of motion to build 'full-body co-ordination, balance and strength', says Aimee Victoria Long, one of London's leading PTs, ...

Alan Ritchson fully embodies this commitment, transforming into the formidable lead of Reacher through relentless workouts.

Designed to push your biceps and triceps past their limits, this routine has gone viral for how punishing (and effective) it is. But be warned—it’s not for the faint of heart.