Perform just like an air squat, except with resistance. Resistance should be kept at shoulder level in front of the body and not behind the neck. Be sure not to let the resistance change your posture. Look up or directly ahead as you perform the squat. Squat all the way down as far as you can, making sure to sit your weight back so your knees do not extend over your feet. Also keep your knees from pointing inward.
Push up strongly from the legs and glutes. Don't move your hands. Keep the weight in the same place directly in front of your shoulders.