Social media users were impressed by the room transformation, with one saying "that's the best use of space I've seen." ...
Follow along with trainers Jacqueline Kasen and Gerren Liles in the workout video above, or if you're ready to HIIT it solo, read the instructions below for a self-guided workout.
In less than 20 minutes, you can sculpt your arms and abs with this upper body dumbbell workout, all while getting your heart ...