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.
Trying Out a Weight. Another method involves sitting down with a trainer at the leg press to find your maximum. To do this, warm up for five to 10 minutes. Rest for one minute. Seat yourself in the press and select a weight you can comfortably press three to fives times by adding 30 pounds to 40 pounds.