Start in a standing position with your arms bent and hands lifted slightly above your left shoulder.
Bend your right leg at the knee, lifting it toward your chest. Twist your torso and arms, crunching your upper body down toward your knee. Try to touch your hands or elbow to your knees.
Return to the starting position. This counts as one rep.
Repeat for 30 seconds, then switch sides and repeat for another 30 seconds.