Our children are obese, either have or being threatened by diabetes, high blood pressure, high cholesterol, and not socially adjusting properly to others because of a lack of fitness. ↗
Fitness is a curve. You can be Lance Armstrong, or you can be really out of shape at the opposite end. People enter the curve wherever they are and then they can move up the curve, by better nutrition and better exercise. ↗
It's not about weight, it's about fitness, and one component of being fit is to have relatively low body fat, because fat is not very efficient, whereas muscle is. ↗