Strength training, not weightlifting

Don't confuse strength training with weightlifting, bodybuilding or powerlifting. Trying to build big muscles can put too much strain on young muscles, tendons and areas of cartilage that haven't yet turned to bone (growth plates) — especially when proper technique is sacrificed in favor of lifting larger amounts of weight.

For kids, light resistance and controlled movements are best — with a special emphasis on proper technique and safety. Your child can do many strength training exercises with his or her own body weight or inexpensive resistance tubing. Free weights and machine weights are other options.