Hold each position for 30 seconds before moving on to the next.
1. Front plank:
Start by lying face down. Raise your body on to toes and forearms, keeping back, neck and head in a neutral position. Your body should be in a straight line. Engage your core.
2. Side plank:
When in plank position, rotate on to one side, holding your weight on one forearm, with legs straight and feet stacked on top of each other. Lift the other arm. Push your hip to the ceiling to maintain alignment.