“Will lifting weights stunt my child’s growth?”
It’s one of the most common questions we hear from parents, and it’s a fair one. When your kid is still developing, the last thing you want is for training to work against them.
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Does Weight Lifting Stunt Growth in Kids?
Written by Coach Francis, CSCS Strength and Performance Coach at UNITE.rehab.perform | CSCS Certified | Specializing in Youth Athletic Development and Long-Term Performance Training
Here’s the direct answer: no. There is no scientific evidence showing that properly supervised strength training stunts growth in children or teenagers. In fact, the research points the other way. When done correctly, youth strength training can improve bone density, strengthen joints, enhance coordination, and meaningfully reduce the risk of injury.
The myth has persisted for decades. But the evidence tells a different story, and every parent of a young athlete deserves to know what it actually says.
Does Weight Lifting Actually Stunt Growth?
No. Current research shows that properly supervised strength training does not stunt growth in children or teenagers. In fact, it can improve bone density, coordination, strength, and injury resistance when programmed appropriately and guided by a qualified coach.
Organizations including the American Academy of Pediatrics and the National Strength and Conditioning Association (NSCA) support youth resistance training as safe and beneficial when technique, supervision, and age-appropriate progression are in place.
The concern is understandable. But it is not supported by the science.
Where the “Stunted Growth” Myth Comes From
This concern did not come out of nowhere. Years ago, injuries did happen when young athletes lifted with poor technique, trained without supervision, or used weights that were far beyond their ability level.
The problem was never strength training itself. It was how it was being done.
As coaching standards have improved and awareness around youth training has grown, those risks have become well understood and largely preventable. The conversation has shifted from “should kids lift?” to “how should kids lift?” and that distinction matters enormously.
What Parents Should Know About Growth Plates
Growth plates are areas of developing cartilage tissue near the ends of long bones. They are active during childhood and adolescence, and they do deserve consideration in any youth training program.
But here is what often gets left out of this conversation: the sports most young athletes are already playing place far more unpredictable and high-impact stress on growth plates than a well-structured strength program ever would.
A football tackle, a hard landing in basketball, a full-speed collision in soccer, a tumbling pass in gymnastics. These are the moments that create real growth plate risk. A controlled, progressive strength program with a qualified coach is not in the same category.
When strength training is properly designed and supervised, it is controlled, gradually progressive, and actually supports healthy bone and tissue development rather than threatening it.
Benefits of Strength Training for Kids and Teen Athletes
Beyond dispelling the myth, it is worth understanding what young athletes actually gain from strength training:
- – Stronger bones and joints through progressive mechanical loading that supports healthy development
- – Improved coordination and movement quality that translates directly to sport performance
- – Injury prevention by building the physical resilience to handle the demands of practice and competition
- – Better athletic development across sport skills like speed, power, and agility
- – Increased confidence from mastering new movements and seeing measurable progress
- – Long-term durability so athletes can stay healthy and keep competing as demands increase
For young athletes in basketball, volleyball, football, soccer, baseball, and gymnastics, these are not small advantages. They compound over time and often separate athletes who stay healthy and develop consistently from those who cycle through recurring injuries.
How to Make Strength Training Safe for Young Athletes
Safe and effective youth strength training comes down to a few non-negotiables:
- — Technique before everything else. Movement quality is the foundation. Weight is secondary and always will be
- — Gradual, controlled progression. Training should increase in difficulty over time, not all at once
- — Age and experience appropriate programming. What works for a 16-year-old with two years of training history is not the starting point for a 10-year-old
- — Qualified supervision. A knowledgeable coach who understands youth development changes everything
When these principles are in place, strength training becomes one of the safest and most valuable activities a young athlete can participate in.
Common Mistakes in Youth Strength Training
Even well-intentioned programs can fall short. Watch for these:
- — Maxing out too early before foundational movement patterns are established
- — Poor or absent supervision leaving technique to break down unnoticed
- — Prioritizing weight over mechanics which increases injury risk and reinforces bad habits
- — Excessive volume that leaves young athletes chronically fatigued rather than developing
- — Skipping strength work entirely and sending athletes into high-demand sports without preparing their bodies to handle force
That last one is more common than most parents realize, and it is one of the biggest contributors to youth sports injuries.
When Should Kids Start Strength Training?
There is no universal age cutoff. What matters more than age is maturity level, coaching quality, and readiness to follow instruction.
General guidance:
- — Younger athletes (6 to 10) benefit most from movement-based activities, bodyweight coordination work, and learning to control their own body before adding any external resistance
- — Pre-teen athletes (10 to 13) can begin more structured bodyweight and light resistance training with proper supervision and a focus on movement quality
- — Teen athletes (13 and up) are generally ready for more structured progressive strength training, particularly when foundational movement patterns are already established
The goal at every stage is the same: build competent, confident movers. The weight follows the skill, not the other way around.
Why Strength Training Matters for Long-Term Athletic Development
The real risk for young athletes is not strength training. It is skipping it.
Sending athletes into fast, high-impact sports without preparing their bodies to handle force is one of the most reliable ways to produce overuse injuries, burnout, and early dropout from sport. Strength training builds physical resilience. It prepares joints, tissues, and the nervous system for the demands of competition.
At every level, from youth rec leagues to high school varsity programs, the athletes who strength train consistently tend to move better, recover faster, and stay healthier over the long run.
The goal is not just skill development. It is building physically prepared, confident athletes who can handle what their sport demands today and keep developing for years to come.
Ready to Build Your Young Athlete the Right Way?
Want to help your young athlete build strength, confidence, and long-term durability safely? A movement assessment with our performance team is the place to start.
We will evaluate how your athlete moves, identify any gaps in their physical development, and build a training plan focused on injury prevention, athletic performance, and long-term success.
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Coach Francis, CSCS
Coach Francis, CSCS, is a Strength and Performance Coach at UNITE.rehab.perform in Thornton, CO, specializing in youth athletic development, explosive power training, and long-term performance programming for athletes at every level.
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