Stand tall in first position with your right hand resting on the back of the chair. Brace your abs in tight and lift your left leg in front of your body as high as you can, keeping your back straight and tall. Raise your left arm to create half of a frame around your face in third position. Your left toes should be pointed.
Slowly open your leg out to the side, lowering your arm into second position by reaching it out to the side of your shoulder, elbow slightly bent, palm facing front. Circle your leg (rond de jambe means "circle of the leg") behind you, reaching your arm overhead back into third position, leaning forward from your hips to bring your torso parallel to the floor. Slowly lift back up, keeping your spine straight, and lower your leg and arm back into first position. That's one rep. Repeat 10 times total with the left leg, 10 times with the right.