In years past there were concerns that school age children and teens might run a higher risk of injury. But recent studies are showing the risk is no higher and sometimes less than that from other types of exercise or sports.
Strength training can be performed using free weights, exercise machines, elastic bands or the body's own resistance. Professional supervision is always recommended.
The potential benefits include increased bone density, decreased body fat, and boosting performance.
There is more on this latest research in the journal Pediatrics.