The 'Run the Rack' dumbbell method involves performing reps of an exercise to failure using each set of weights in the rack.

Stand with your feet hip-width apart, holding a pair of dumbbells in a neutral grip (palms facing each other). Squeeze your ...

Sit tall on a flat bench, feet planted, dumbbells just outside your thighs. Lean forward and in one explosive motion sit back ...

It’s designed to challenge muscular endurance and strength, as well as your cardiovascular fitness. If you own a WHOOP fitness tracker Britton says it's a great opportunity to try one of WHOOP’s ...