The “Scientific Seven Minute Workout.” Involves 12 exercises (Jacks, Wall sit, Merkin, V sit, Step up, Squat, Dips, Plank, High knees, Lunges, Merkin w alternating arm rotation, Side plank) for 30 seconds each at max effort followed by a 10 second rest. We did it. Then we did it for 60 seconds. Then again at 30 seconds. Fun.