183This entry was posted in Daily 20-Min Workouts on August 12, 2015 by OPEN GYM Fitness 3 Sets of: TRX Single-Leg Squats, 8/side 12 Back Extensions Then, Heavier Dumbbell Lunges, down and back x 3 Then, For 6 Minutes: 12 Reverse Fly Sled Push, down and back 24 Russian Twists w/Med Ball Sled Push, down and back