Helping your children develop muscle mass is an important part of parenting so they are stronger, healthier, and less likely to become injured. The best form of training is the “slow burn” system, which allows your child to make steady, controlled movements and gradually improve. Let your child slowly use the weight machine and time them for as long as they can go. Then, record their time and weights level in a log to track their improvements. If your child is younger, be sure to use lighter weights, and always monitor his training to ensure he perform the exercises in a safe and controlled way.