702This entry was posted in Daily 20-Min Workouts on July 22, 2017 by OPEN GYM Fitness For 20 Minutes: 2 Squat Press 2 GHD Sit Ups w/ Med Ball 4 Squat Press 4 GHD Sit Ups w/ Med Ball … Continue to ladder up by 2’s. Do 6 of each, then 8 of each, and so on.