Kneel with the ball in front of you and your elbows resting on the ball.
Roll the ball forward while keeping your knees in contact with the floor.
Take your body forwards until your hips knees and shoulders are in a straight line and repeat in a rhythmical fashion.
Your arms should not move higher than shoulder height and your shoulder blades remain flat against your back.
This exercise will work your abdominals and hip flexors as they lengthen and your muscles may start shaking.
If so, move until you just start to shake and then return to the start position.
Aim to increase the number of repetitions as you get stronger.
