Lie with your back flat on a mat, holding a physioball between your ankles. Keep your legs straight and squeeze the ball between your ankles. Lift the ball off the mat as you simultaneously lift your torso, curling up so your hands reach the ball. Grab the ball with your hands, then lower your body to the mat with control. Repeat the motion, lifting the ball with your hands until you can grip it with your ankles. Slowly lower and repeat.
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