Circuit 4, Exercise 4: Russian Twist Sit on the floor with your knees bent. Slowly lean your torso backward until you feel your lower abs engage. Lift your feet off the floor, or rest them on the ground if that's too hard. Try not to round your back. Place your arms out in front to help you stay balanced on your sitz bones. Keeping your core strong, slowly twist your torso to the right, touching your hands to the ground. The movement is not large and comes from the torso rotating, not from your arms swinging. Slowly rotate the torso back to centre and twist to the left touching your hands to the ground. This completes two reps. Perform 50 reps (25 per side). Image Source: Priscilla Frederick-Loomis