In less than 20 minutes, you can sculpt your arms and abs with this upper body dumbbell workout, all while getting your heart rate up and boosting your metabolism. Part of the Women's Health+ Ultimate HIIT Challenge,

The workout is broken down into eight rounds with 30-second work intervals for each exercise (two minutes in total) and a quick 30-second rest between rounds. In the early rounds, you’ll start by alternating between Skier Swings and Mountain Climbers – an excellent combination for boosting your heart rate and engaging your core.