Strength training (or resistance training) uses a resistance to increase an individual's ability to exert force. It involves the use of weight machines, free weights, bands or tubing, or the individual's own body weight. This is not the same as Olympic lifting, power lifting, or body building, which requires the use of ballistic movements and maximum lifts and is not recommended for children.

The following are answers from the American Academy of Pediatrics to common questions about strength training.

The risks of participating in an unsupervised strength training program include injury to the discs and growth plates of the spine and even occasionally death from weights landing on the chest wall. A well-supervised program has a coach-to-student ratio of 1:10 or less and proper certification of the instructor. Significant injuries are rare in well-supervised programs, but can include stress fractures of the shoulder (osteolysis) or spine (spondylolysis), muscle strains, disc...

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