Plank

An exercise to strengthen multiple muscles in the body, including the stomach muscles, biceps and quads. To do a plank, lie face down on the floor and prop yourself off the ground by placing your forearms flat on the ground, making a right angle with your upper arm. Keep your back parallel to the ground and raise yourself on to the tips of your toes. Hold this position for 10 seconds, rest and repeat. Aim to increase the number of seconds you hold the pose for each time to further challenge the body.