Great posture is crucial. With this move we are activating and mobilising the glutes and the front and top of the leg, which contribute to postural stability.
Begin with your feet shoulder width apart, take a stride forward bending that leg until your shin is in a vertical position. As you do this, roll your rear foot onto your toes. Your rear knee moves forward so that it forms a straight line from your knee to your shoulder.
Reach your arm up towards the sky as you drop into a lunge for a couple of seconds. Return to the starting position and repeat with the other leg. Try five each side. If you experience back pain, ensure your rear knee is below your shoulder. Ask a friend to check your form. If you feel any knee discomfort, reduce the depth of the lunge.