I 100% agree with William. I lost 38 lbs my senior year in high school. I wanted to wrestle a 3 time state champ. Bad idea. My body was so weak I never faced him. In fact the weight above me was won by one of my teammates who I could destroy. Let your child enjoy the sport at his/her natural weight. As William said maybe 5-10lbs if taken off slowly. Get your kids body fat checked first.