Youth Resistance Training — Myths vs. Evidence

Several professional bodies have addressed common myths — the NSCA (2009 position statement), the American Academy of Pediatrics (2020 clinical report), and the 2014 International Consensus on youth resistance training (adapted from the UK Strength and Conditioning Association's position statement):

• Myth: "Resistance training stunts growth / damages growth plates." Evidence: the NSCA statement reports that growth-cartilage injury has not been reported in any prospective youth resistance-training study and that there is no evidence resistance training harms growth and maturation. The case reports of growth-plate injury (mostly from the 1970s–80s) were mainly due to improper technique, maximal lifts, or lack of qualified adult supervision. Following age-specific guidelines (and adequate calcium), resistance training can help maximise bone mineral density in childhood and adolescence.
• Myth: "Children can't gain strength because they lack testosterone." Evidence: children do make meaningful strength gains; in children these are more related to neural adaptations (motor unit activation, coordination, recruitment and firing) than to muscle growth (NSCA 2009).
• Myth: "It's too dangerous." Evidence: in a retrospective comparison cited by the NSCA, resistance training (0.012 injuries per 100 participant-hours) and weightlifting (0.0013) were far safer than rugby (0.80). Most reported injuries trace to unsupervised activity or improper loading; lower-back pain is the most common complaint, especially with maximal or near-maximal lifting.

Keys to safety: qualified supervision, age-/maturity-appropriate progression, technique mastery before load, submaximal loads, adequate recovery, and a positive, fun environment.

Educational only. Children with health conditions should be cleared and guided by a pediatric clinician.

• No evidence that proper, supervised resistance training stunts growth or routinely harms growth plates.
• Pre-pubescent strength gains are real and largely neural (recruitment/coordination), not hypertrophy.
• Resistance training can improve youth bone mineral density.
• Injury risk is low with supervision; risk rises with poor technique/unsupervised maximal loads.