Anna Kaiser's AKTread treadmill workout is nothing if not entirely badass. And believe it or not, this 10-circuit (plus warmup and cooldown!) workout is her beginner workout! When Anna told POPSUGAR that Shakira has been doing treadmill workouts to prep for her world tour, we knew we needed to see more - and once we saw, our jaws were on the floor. Are you ready to try it? With dumbbell and bodyweight exercises, you'll combine strength and cardio using audio cues from Anna for the whole two hours.