Healthy Food Guide fitness expert Sarah Cowley takes you through a challenging core exercise.
I would start by doing two to three sets of eight, for this exercise, building up to 10 repetitions each side. Keep your chest open and some width across your shoulders as you go through the movement. Once you feel ready to move on to the next level, where your hips are off the ground, simply straighten your leg. Bend your top leg back in and lower your hips to the ground.