Target your obliques as well as your hips and thighs with this exercise!
How to do it: Start in a full plank and then lower your knees to the floor gently, keeping your weight in your hands and resting the tops of your feet on the floor. Extend your right leg out straight behind you at about hip level. Bend your right knee and bring it up towards your right shoulder, looking over your right shoulders as the leg comes in. Extend it back out behind you. That’s one rep. Repeat 15 time on each side.
Bonus tip: The further away from your hands your knees are, the more challenging this move gets.