DoDay has many young clients from 8 to 18 years old, and we’ve seen time and time again how transformative strength training can be for their fitness, mental health, confidence, recovery from injury, or improvement in sport. But many parents question whether strength training is appropriate or safe for kids. When most people think about muscles, they picture strength or fitness. But healthy muscles do much more than help kids run faster or look fit — they protect joints, keep bones strong, support the heart, and even help regulate blood sugar and metabolism. Good muscle health makes everyday activities easier, reduces the chance of injury, and sets children up for a lifetime of movement.
Strength training doesn’t just build bodies — it supports brains too. Research shows that regular resistance exercise can improve memory, focus, mood, and confidence. It also helps kids develop coordination, balance, and resilience.
Dr. Gonzalo De Angulo, GP, explains:
“Kids can safely start strength training at an early age if it is done in a way that matches their age and abilities, with proper technique and close supervision. That said, preadolescents and adolescents should avoid practices like powerlifting, bodybuilding, or attempting maximal lifts. This is where proper guidance and age-appropriate progression become especially important.”
Like any sport, injuries can happen, but with the right support and safe progression, strength training is one of the most effective ways to build healthier, stronger bodies and minds for life.
Claire Shield, Principal Physiotherapist at The Physio Stop, highlights that strength training is not only safe but strongly recommended when supervised:
Is strength training beneficial for kids? Yes! It improves bone density (it doesn’t stunt growth), boosts cardiovascular health, builds overall fitness, and increases confidence in moving well.
Is it safe for kids? It is safe as long as it is supervised by a qualified personal trainer or physiotherapist.
At what age can kids start? Every child is different, but most can start safely by the end of primary school. “Going to the gym doesn’t mean lifting heavy weights — programs can be fun, engaging, and tailored to each child’s needs,” says Shield.
Anything kids shouldn’t do? Avoid unsupervised training and heavy maximal lifts. Working with a professional ensures safe technique, effective exercises, and positive experiences.
According to the Australian Physiotherapy Association (APA), strength training can be a safe and beneficial activity for children and adolescents when it is age-appropriate, closely supervised, and focused on correct technique rather than heavy loads. The APA emphasises that resistance training should be introduced gradually, with an emphasis on fun, skill development, coordination, and safe movement patterns. When guided by qualified professionals such as physiotherapists or personal trainers, strength training not only improves physical health and reduces injury risk but also builds lifelong confidence in movement and physical activity.
“Michael is amazing and supportive. He helps me stay motivated and wants the best for me. Michael makes his PT sessions fun and enjoyable. I always look forward to seeing Michael and knowing I’m going to get the best out of the session!”
– Maddison Godfrey, 16
“Thank you so much for starting with my son today. He was so positive when he got in the car. A spark I haven’t seen in him for a while! Looking forward to his new journey!”
– Parent of 14-year-old boy
Australian Physiotherapy Association. (n.d.). About us. Australian Physiotherapy Association. Retrieved September 18, 2025, from https://australian.physio
Australian Government Department of Health. (2021, May 7). Physical activity and exercise guidelines for children and young people (5–17 years). Retrieved September 18, 2025, from https://www.health.gov.au/topics/physical-activity-and-exercise/physical-activity-and-exercise-guidelines-for-all-australians