After 11 years of filming workouts for this site, THIS IS MY FAVORITE WORKOUT SO FAR! I love it so much, I actually do it once a week myself! These 20 minutes go by sooooo fast. I've never done this format before, but I decided to do each exercise only one time. This keeps it fun and fresh and interesting the whole time!
I'm using a pair of 8 lb dumbbells for the entire workout. And you'll need one heavy dumbbell for one sequence.