Lie next to a wall on your back with your legs bent and feet flat on the floor.
Place a stability ball between the wall and your knee.
Apply gentle pressure so that the ball does not move.
Lift your hips off the floor and straighten your hips until your knees, hips and shoulder are in a straight line.
At the same time, increase the pressure on the ball.
Hold briefly and then return to the starting position in a controlled manner.
