If you have ever watched your kid eye the dumbbells in the garage and felt a flicker of worry, you are in good company. Many of us grew up hearing that lifting weights would “stunt your growth” or was only for grown-ups. The good news? The research has moved on, and it is far more encouraging than the old warnings.
Over the last few decades, major organizations, including the National Strength and Conditioning Association (NSCA), the American Academy of Pediatrics (AAP), and an international group of experts who published a consensus statement in the British Journal of Sports Medicine, have reviewed the evidence on youth resistance training. Their conclusion is remarkably consistent: when it is well designed and properly supervised, strength training is safe and beneficial for children and adolescents.
Let’s unpack the most common myths one by one, then look at what a smart, kid-friendly approach actually looks like.
Myth #1: “Lifting weights will stunt their growth”
This is the big one, and it is the myth parents ask us about most. The worry usually centers on the growth plates, the areas of developing cartilage near the ends of long bones where growth happens.
Here is what the evidence says: expert reviews, including the NSCA’s position statement (Faigenbaum et al., 2009) and the 2014 international consensus (Lloyd et al.), found no evidence that appropriately designed and supervised resistance training harms growth plates or reduces a child’s eventual height. The AAP’s clinical report on resistance training for children and adolescents (2020) reaches a similar conclusion.
In fact, weight-bearing and muscle-strengthening activities are part of how kids build strong bones. That is why both the World Health Organization and the U.S. Physical Activity Guidelines recommend bone-strengthening activity for young people at least three days per week. The injuries that do occur in youth weight training are most often linked to unsupervised lifting, poor technique, trying to lift too much too soon, or accidents with equipment at home, not the training itself.
Evidence note
Everyday play already puts serious forces through a child’s body. Jumping off playground equipment, sprinting, and landing in sports can create loads that are comparable to, or greater than, a well-coached beginner strength session. What matters most is technique, supervision, and gradual progression.
Myth #2: “Kids can’t get stronger before puberty anyway”
It is true that younger children do not have the hormonal environment that allows teens and adults to build a lot of muscle size. But strength is not only about muscle size. Children can make meaningful strength gains through improvements in the nervous system: better coordination, more efficient recruitment of muscle fibers, and improved movement skill.
The NSCA and the international consensus both note that preadolescent children can improve strength with regular training, and that those gains come alongside improvements in motor skills such as jumping, sprinting, and throwing. For young kids, strength training is really movement training, and that is a wonderful foundation for everything from soccer to climbing trees.
Myth #3: “It’s dangerous, so they should wait until high school”
There is no single “right” birthday for starting. Instead, experts point to readiness. A common guideline in the research is that if a child is ready to take part in organized sports and can listen to and follow instructions, they are generally ready for some form of supervised strength training. For many children, that is around age 7 or 8.
Waiting until the teen years can actually mean missing a valuable window to build movement skills and confidence. The 2014 consensus statement emphasizes developing fundamental movement competence early, so that kids have the coordination and body awareness to train safely as they grow.
That said, “ready” does not mean “ready for a barbell max.” For younger children, strength training looks a lot like play: bodyweight squats, bear crawls, carrying things, hopping games, and medicine ball tosses.
Myth #4: “Strength training is only for kids who want to be athletes”
Strength matters for every kid, not just the ones heading to varsity tryouts. The research links youth resistance training with a range of benefits, including:
- Improved muscular strength and power
- Better motor skills and sport performance
- Stronger bones during the years when bone mass is being built
- Potential reduction in sports-related injury risk when included in well-designed programs
- Improved confidence and a more positive attitude toward physical activity
For kids who do not love team sports, strength training can be a refreshing way to feel capable in their bodies. It rewards effort and consistency, and progress is easy to see. Maybe that is doing five push-ups this month when they could only do two last month.
Myth #5: “Kids should just do light weights for lots of reps”
High reps with light weights can be a fine starting point, especially while a child is learning technique. But the evidence does not support the idea that kids can only ever use light loads. The NSCA’s position statement describes a progressive approach: begin with one to two sets of roughly 10 to 15 repetitions with a light to moderate load, focus on technique first, and then gradually increase the challenge as skill and strength improve.
For older, more experienced teens with great technique and qualified coaching, heavier loads with fewer reps can be appropriate. The key words are progressive and supervised. Load always comes after form, not before.
Myth #6: “If they’re strength training, they need protein shakes and supplements”
Most active kids and teens can meet their nutritional needs through regular meals and snacks. The AAP has cautioned against performance-enhancing supplement use in young people, and the Dietary Guidelines for Americans emphasize a varied eating pattern with protein foods, dairy or fortified alternatives, grains, fruits, and vegetables. Rather than reaching for a tub of powder, focus on consistent meals, a protein-containing snack after practice, and plenty of water. If you have concerns about your child’s growth or eating, their pediatrician or a registered dietitian is the right person to talk to.
What a smart youth strength session looks like
Here is the kind of simple, well-rounded session that fits the guidance above. It works for a beginner around ages 10 to 14, and it can be scaled up or down.
| Exercise | Sets × Reps | Rest | Coaching cues |
|---|---|---|---|
| Bodyweight or goblet squat | 2 × 10–12 | 60 sec | Chest tall, knees track over toes, sit between the heels |
| Incline push-up (hands on a bench) | 2 × 8–12 | 60 sec | Straight line from head to heels, lower with control |
| Glute bridge | 2 × 12 | 45 sec | Press through heels, squeeze glutes at the top |
| Band or dumbbell row | 2 × 10–12 | 60 sec | Pull elbows back, shoulders away from ears |
| Bear crawl | 2 × 20 sec | 45 sec | Knees hover, slow and steady, flat back |
| Two-foot hops and soft landings | 2 × 6 | 60 sec | Land quietly with bent knees, “like a ninja” |
Start with a five-minute warm-up that includes light jogging, skipping, arm circles, and a few practice reps of each exercise. Two or three sessions per week on non-consecutive days is plenty, and the session should always feel like something kids are proud of, not something they dread.
When to pause and check in
Stop the session and consult your child’s pediatrician if there is pain (not just normal muscle effort), joint swelling, dizziness, or pain that lingers into the next day. Children with a heart condition, a recent injury, or another medical condition should get their doctor’s okay before starting a new program.
Our top safety principles for families
Supervision first
A knowledgeable adult should watch every session. Qualified coaching is ideal, especially as loads increase.
Technique before weight
Master bodyweight versions before adding load. Add weight in small steps only when form stays solid.
Safe space
Clear the floor, store equipment securely, and keep younger siblings away from racks and heavy weights.
Make it fun
Use games, challenges, and variety. Kids who enjoy moving are far more likely to keep moving as adults.
How to talk to your kids about strength
The words we use matter. Frame strength training around what their body can do, not what it looks like. “Look how much higher you jumped!” lands very differently than comments about muscles or size. With teens especially, steer conversations away from bulking, cutting, or changing their bodies, and toward feeling strong, confident, and ready for the things they love.
Better yet, train together. When kids see their parents lifting, stretching, and moving with joy, it becomes a normal part of family life. As we like to say around here: Strong Mamas raise strong futures, and strong dads do too.
Frequently asked questions
How young is too young to start?
There is no strict age cutoff. Experts generally look at readiness: can your child follow instructions and take part in organized sports? For younger children, focus on playful bodyweight movement rather than structured lifting.
Should my teen use a gym?
A gym can be a great place to train if there is qualified supervision and your teen has learned good technique. Many teens do well with a coach, a school strength program, or a structured plan they follow with a parent nearby.
Can strength training replace sports or free play?
Think of it as an addition, not a replacement. Kids still need a variety of activities and plenty of time for unstructured play. Strength training supports all of it.
Where to go from here
If you want a step-by-step plan, explore our teen training program for adolescents ready for structured training, or our kids movement page for playful ideas the whole family can do together. For the full picture of how movement fits into family life, visit our exercise programs hub.
This article is for educational purposes only and is not medical advice. It is researched from and cited to published guidelines and peer-reviewed research. Please talk with your child’s pediatrician or healthcare provider before starting a new exercise program, especially if your child has a medical condition or injury. See our medical disclaimer.
Sources & further reading
- Faigenbaum AD, Kraemer WJ, Blimkie CJR, et al. Youth resistance training: updated position statement paper from the National Strength and Conditioning Association. Journal of Strength and Conditioning Research, 2009.
- Lloyd RS, Faigenbaum AD, Stone MH, et al. Position statement on youth resistance training: the 2014 International Consensus. British Journal of Sports Medicine, 2014.
- Stricker PR, Faigenbaum AD, McCambridge TM; Council on Sports Medicine and Fitness. Resistance Training for Children and Adolescents. Pediatrics (American Academy of Pediatrics), 2020.
- World Health Organization. WHO Guidelines on Physical Activity and Sedentary Behaviour. WHO, 2020.
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans, 2nd edition. HHS, 2018.
- U.S. Department of Agriculture and U.S. Department of Health and Human Services. Dietary Guidelines for Americans, 2020–2025. 2020.
Mom, designer and founder of Steady & Strong Wellness. Katelyn researches every article from official guidelines and peer-reviewed studies, and always encourages readers to partner with their own healthcare providers.
@steadyandstrongwellness
