Holding onto two dumbbells in push-up position, row your right dumbbell while maintaining position. Set the dumbbell down, row your left dumbbell, and then do a push-up. This workout will have a 2:1 work/rest ratio. PERFORM PER ROUND: 30 sec  – Dumbbell Row Push-ups 30 sec – Jumping Jacks 30 sec  – Dumbbell Row Push-ups 30…