Answer Wiki. The system would be cued off the pilot's helmet, so it will definitely look where your head is pointing, not your eyes specifically (that would be a gaze-tracking system, which AFAIK hasn't yet been used for this kind of application).
Exercise to Gain Leg Weight. Although you can't make your body gain weight in your legs, you can perform exercises that encourage the growth of leg muscle. Squats, lunges and step-ups are examples of such moves that target the legs and recruit a lot of muscle fibers for growth.
Hold the position for 30 seconds. Repeat with the other leg and do two reps on each side. Gradually build up to more reps each day. Lie on the ground with your legs extended straight out. Slowly lift your right leg as high as you can without taking your left leg off the ground or experiencing pain. Keep your leg straight as you lift it, while pointing and flexing your feet. Hold for 10 to 20 seconds, then repeat with the other leg. When pointing and flexing your feet, you're working the gastrocnemius and soleus of your calves, and the leg-lifting motion works your glutes, hamstrings and quadriceps.