Using these he can maintain much better biomechanics throughout the lift. For the deadlift, he will be able to keep his torso more erect, allowing him to use his legs more efficiently, with less compression and extension of his vertebrae. The same holds true for the squat. At this point I want to stress that if you are a beginning weight trainee, and can perform an exercise using a conventional range of motion, with proper biomechanics, you should wait to use modified reps until you can strictly bench press at least 200 lbs, squat 300 and deadlift 350. There are two types of scoliosis-structural and functional.
Structural scoliosis is an irreversible lateral curvature that can only be corrected with surgery.
Functional scoliosis is usually reversible by strengthening the muscles that control its movement, and by applying functional skill development training. Adam's scoliosis was functional, so we set out to strengthen all the muscles that control every possible plane of its movement. By developing the strength of these muscles, and by consciously working to maintain good posture at all times, Adam could improve his condition. You see, it's not good enough just to have greatly increased strength. You have to teach the body to use it-by practicing the specific skill you want it applied to.