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.
For legs and HDL levels that are something to look at, follow the lead of the men in the study: Do three sets of six to eight repetitions of the half squat, leg extension, and leg press, resting no more than 2 minutes between sets. Use a weight that's about 85 percent of the amount you can lift just once.