Stand with your right foot forward and your left foot back, keeping your feet far enough apart that your front knee will not go over your toe as you lunge.If you can, grab something to act as small free weights, then bend your back knee toward the floor.Lower down until your back knee almost touches the floor (or higher if your hip flexors are tight). Keep the front knee aligned behind the toe and be sure to lower straight down, rather than forward. Push back to start without locking your knees.