22This entry was posted in Daily 20-Min Workouts on January 31, 2015 by OPEN GYM Fitness For 4 Minutes: 8 Shoulder Press 20 Air Squat For 4 Minutes: 8 Pull Up 20 TRX Jump Squat For 4 Minutes: 8 Push Up 20 Wall Ball (or Med Ball Squat Press) ~Rest 2-3 Minutes Between Circuits~