To increase stability and protect the joints of the in the lower back by strengthening the chains of deep abdominal and hip muscles.
Lie on your back with hips and knees bent and feet comfortably apart. Arms should be under your head or by your sides.
Whilst breathing out contract your abdominal/core muscles and attempt to push your low back into the floor by tilting your pelvis upwards/backwards. Hold for 5 seconds before relaxing.
It is important to perfect the movement of the pelvis, do not lift the buttocks away from the floor.