Pelvic Tilt on Ball
Pelvic tilts are an effective exercise to work your lower back and abs gently. Using a ball can add balance and involve most stability muscles in your lower area. Start with sitting on a gym ball and walk the feet forward slowly until your shoulders and head are on the ball. Make sure to bend your knees 90 degrees and lift your hips. Arch the back as well as rotate the hips to the ball. Make sure to do it subtly and slowly so that your abs can be stretched. Next, curve the hips up gently while keeping the ball stable. Do this for 10 to 15 reps. [5]
