Should kids lift weights? It is one of the most common questions parents and coaches ask, and it is surrounded by myths. Many worry that strength training or weightlifting will stunt an adolescent’s growth or cause injury, and hold their child back from the gym as a result. In reality, the research tells a very different and reassuring story. When done properly, adolescent strength training is not only safe, it is genuinely good for young athletes. Here is what the evidence actually says, and how to get it right.
Should Kids Do Strength Training?
The short answer, backed by a large body of research, is yes. For years, a common belief held that lifting weights was dangerous for growing bodies. Modern evidence has overturned that idea. Leading sports medicine and paediatric organisations now agree that well-designed, supervised strength training is both safe and valuable for children and adolescents. The key is not whether young people should train, but how they should do it.
Is Strength Training Safe for Adolescents?
When performed with good technique, proper supervision and sensible progression, strength training is relatively safe for adolescents, with injury rates that compare favourably to many common sports. Problems tend to arise not from the activity itself but from poor form, lifting loads that are too heavy too soon, or training without guidance. A qualified coach or physiotherapist can teach correct movement patterns and progress the load appropriately, which is what keeps young athletes safe.
The Myth About Growth Plates
The biggest fear parents raise is that lifting weights will damage growth plates, the areas of developing cartilage near the ends of long bones, and stunt growth. This concern is understandable but not supported by the evidence. When training is properly supervised and loads are appropriate, weightlifting does not appear to harm growth plates or affect a child’s final height. In fact, unsupervised backyard maximal lifts and high-impact sports carry more risk than a structured program.
The Benefits of Strength Training for Teens
Far from being harmful, resistance training offers real benefits for young people. Research, including a study by Lloyd and colleagues, has found significant improvements in muscle strength and power in pre- and early-pubertal children, with no adverse effects on growth or injury rates. Beyond strength, the benefits include better bone density, improved athletic performance, healthier body composition, and importantly, a lower risk of sports injury thanks to stronger, more resilient tissues. Building these habits early also supports lifelong health.
What the Experts Recommend
Major bodies are consistent in their advice. The American Academy of Pediatrics supports appropriately designed and supervised strength training for children and adolescents, stressing correct technique, gradual progression and qualified supervision. The National Strength and Conditioning Association agrees that resistance training can be safe and effective for young people, emphasising technique mastery over lifting maximal loads. The common thread across all guidance is supervision, individualised programming and a focus on quality of movement.
Common Mistakes to Avoid
A few pitfalls turn a safe activity into a risky one. Ego lifting, or chasing heavy weights before technique is solid, is the most common cause of injury in young lifters. Skipping supervision, copying advanced programs from social media, and neglecting rest and recovery all raise the risk too. Progressing too quickly is another frequent mistake, because weightlifting rewards patience, and slow, steady increases in load build capacity safely. Avoiding these errors keeps young athletes progressing without injury and enjoying their training.
How to Start Safely
Getting started well matters more than getting started heavy. Begin with bodyweight exercises and light resistance to build good technique, and progress the load only once movement is sound. Sessions should be supervised by someone qualified, kept enjoyable, and matched to the young person’s age, maturity and goals. Two to three sessions a week is plenty, with rest in between. A structured strength and conditioning plan can identify any areas to work on and set a safe starting point.
Common Questions
At What Age Can Kids Start Strength Training?
There is no single magic age. Many children can begin age-appropriate resistance exercise once they can follow instructions and maintain good form, often around seven or eight, starting with bodyweight and light loads. The focus at any age should be on technique and enjoyment rather than heavy lifting.
Does Weightlifting Stunt Growth?
No, this is a myth. There is no good evidence that properly supervised weightlifting stunts growth or damages growth plates. The risks come from poor supervision and inappropriate loads, not from resistance training itself.
Do Adolescents Need Supervision to Lift Weights?
Yes. Qualified supervision is one of the most important factors in keeping young people safe and getting results. A coach or physiotherapist ensures good technique, appropriate progression and a program suited to the individual.
What Type of Strength Training Is Best for Teens?
A balanced program using bodyweight exercises, resistance bands, and gradually introduced free weights works well. The best type is one that is supervised, progresses gradually, and prioritises correct movement over how much is lifted.
How BeFit Can Help
At BeFit Training Physiotherapy, we help young athletes train safely and effectively at our Edgecliff and Coogee clinics. Our physiotherapists assess movement, teach sound technique, and design strength programs suited to a teenager’s age, sport and goals, whether the aim is better performance or fewer injuries. Every initial consultation runs for forty-five minutes, one-on-one, with a thorough assessment and a clear plan. No referral is required to book, and parents are welcome to be involved throughout.
Book an appointment at BeFit Training Physiotherapy — no referral needed.
Edgecliff: (02) 9327 7749 | Coogee: (02) 7205 2805 | befittrainingphysio.com/book-now
Related Services
Learn more about our strength and conditioning, sports physiotherapy and sports injury prevention in Sydney.
Further Reading
For more on training young athletes, see How to Build a Stronger, More Resilient Teen Athlete.
References
Lloyd RS, et al. Position statement on youth resistance training: the 2014 international consensus. Br J Sports Med. 2014.
American Academy of Pediatrics. Resistance training for children and adolescents. Pediatrics. 2020.
Faigenbaum AD, et al. Youth resistance training: updated position statement. J Strength Cond Res. 2009.
Australian Physiotherapy Association. Clinical guidelines. physiotherapy.asn.au.
