I can tell you that I always had good posture and good body weight until I got this damn TOS. I use to get compliments all the time on my posture. Two years ago I had my body measured at 11%. I am a male at 6ft tall and 180lbs. I use to workout all the time and have not been able to since April 2011. I have lost my muscle tone and gained 5lbs. I am sure I lost muscle weight and gained fat weight. Muscle weighs more than fat. Don't even want to see my body fat percentage now.