Lie on your left side with your right shoulder stacked over your left elbow, resting your right hand on your hip. Bend both knees to create a 45-degree angle with both legs. This is the starting position.
As you lift your bottom hip off the ground, extend your right leg and right arm away from your torso. Your body should create a straight line parallel to the ground.
Lower your hip back down to the ground, bringing your legs back together at the starting position. This counts as one rep.
Perform as many reps as you can for 30 to 60 seconds on both sides, followed by a 15- to 45-second rest.