192This entry was posted in Daily 20-Min Workouts on August 22, 2015 by OPEN GYM Fitness For 20 Minutes: 1 Man Maker 2 Box Ups (Step Ups or Box Jumps) 2 Man Makers 4 Box Ups 3 Man Makers 6 Box Ups 4 Man Makers 8 Box Ups 5 Man Makers 10 Box Ups And so on…