What Your Kid Actually Gains in the Weight Room: The Truth About Strength Training for Young Athletes

Every May a familiar conversation plays out at the front desk of our gym. A parent walks in, signs their kid up for our youth strength camp, and then quietly pulls a coach aside.

“Be honest with me,” they say. “Is lifting really okay for him? I keep hearing it’s going to stunt his growth.”

It’s the most common question we get about strength training for young athletes, and it deserves a straight answer. The short version: no, strength training does not stunt your child’s growth. It never has. The myth has been studied, restudied, and disproven for more than four decades. Every major medical and sports authority — from the American Academy of Pediatrics to the National Strength and Conditioning Association — agrees that properly coached resistance training is one of the safest, most beneficial things a young athlete can do.

But the bigger story isn’t what kids avoid when they train smart. It’s what they gain. And what they gain is far bigger than a stronger squat or a faster forty.

This is what twenty-plus years of coaching young athletes has taught us about why youth strength training matters — and what your kid actually walks out of the weight room with that they can’t get anywhere else.

The Myth That Won’t Die: Does Strength Training Stunt Growth?

Let’s start where every conversation about this topic starts: the growth plate concern.

The fear comes from a real anatomical fact. Children and adolescents have growth plates — soft cartilage at the ends of long bones that eventually fuse as kids mature. A serious injury to a growth plate can affect bone development. So the worry, on its face, isn’t crazy.

What’s crazy is the leap that followed: that lifting weights damages growth plates.

Here’s what the research actually shows. In studies stretching back to the 1980s, researchers have looked at growth plate injuries in young athletes and traced where they actually come from. The overwhelming majority — well over 90 percent — happen in sports. They happen in football tackles, in baseball pitching with poor mechanics, in gymnastics dismounts, in the ankle landing of a basketball jump. They almost never happen in supervised strength training.

In fact, in the most cited reviews on the topic, properly coached resistance training has one of the lowest injury rates of any youth physical activity. Lower than soccer. Lower than football. Lower than gym class. And yes — lower than just being a kid running around outside.

So why does the myth persist? Two reasons. First, because of a small number of injury reports from the 1970s involving teenagers attempting maximal lifts without supervision in their parents’ garages. That’s not strength training. That’s an accident waiting to happen, and it would have happened with any heavy object. Second, because “lifting stunts growth” is one of those sticky pieces of folk wisdom that gets passed from coach to parent to neighbor for decades after the science has moved on.

Here’s the truth: your kid is far more likely to suffer a growth plate injury this Saturday in their travel league game than they ever will in a coached strength session.

What the Research Actually Says About Youth Strength Training

If you want the official word, you don’t have to look hard. Every major organization that has studied this has landed in roughly the same place.

The American Academy of Pediatrics released its current position on youth resistance training within the last several years. The conclusion: properly designed and supervised strength training is safe and beneficial for children and adolescents and should be part of comprehensive youth fitness programs.

The National Strength and Conditioning Association, the leading professional body for strength coaches in the world, has published multiple position papers on youth training. Their stance is even stronger: kids should be doing resistance training, and starting young (with appropriate programming) is better than starting late.

The International Olympic Committee issued a consensus statement on youth athletic development that puts proper strength training at the foundation of long-term athlete development — not as an optional extra, but as a core part of building healthy, durable young athletes.

The Mayo Clinic, Boston Children’s Hospital, and the American College of Sports Medicine all say the same thing. Done right, with real coaching and age-appropriate programming, strength training for young athletes is safe, effective, and arguably essential.

The science isn’t ambiguous. The science isn’t even close. The myth is just slow to die.

The Real Risks Are in the Game, Not the Gym

Here’s a number that surprises most parents. According to data from the Centers for Disease Control, more than 3.5 million children under fourteen receive medical treatment for sports injuries every year in the United States. Sprains, strains, fractures, concussions, growth plate injuries, ACL tears — youth sports are not the safe, character-building activities our parents told us they were.

That’s not a reason to pull your kid off the field. It’s a reason to think harder about how to keep them on it.

The strongest, most consistent finding in youth sports medicine over the last fifteen years is this: kids who do supplemental strength training have significantly fewer injuries in their primary sport. ACL injuries — one of the most devastating injuries in youth athletics — drop by as much as 60 percent in young athletes who follow a structured strength and conditioning program. Hamstring strains, ankle sprains, shoulder issues from overhead sports, lower back pain from rotational sports — strength training reduces all of them, not by a small margin, but dramatically.

The weight room isn’t where your kid is going to get hurt. The weight room is what’s going to keep them out of the doctor’s office.

What Your Kid Actually Gains in the Weight Room

This is the part of the conversation we wish more parents got to have, because the benefits go far beyond athletic performance. Strength training, done right, builds something deeper than muscle.

A Body That Doesn’t Break

Youth sports have changed in ways our parents wouldn’t recognize. Year-round single-sport play. Club leagues that demand four practices and two games a week. Travel teams. Showcases. Specialization at ages where kids used to still be playing four different sports a year.

Kids today are putting more reps on the same joints than any generation before them. And we’re seeing it. Pediatric sports medicine clinics are full of nine, ten, eleven-year-olds with overuse injuries we used to only see in college athletes. Stress fractures. Tendinopathies. Chronic knee pain. Spinal issues from too many hours in flexion.

Strength training is the antidote. Done right, it builds stronger tendons and ligaments that absorb force without failing, better-controlled hips and core that protect the lower back and knees, resilient shoulders that can handle the demands of overhead sports, and a spine that can handle real load without the postural collapse that plagues so many young athletes.

We’ve seen it in our own gym hundreds of times. The kid who walked in last summer dealing with chronic shin splints comes back the next year and plays a full pain-free season. The high schooler whose travel coach said she was “injury prone” turns out to just be undertrained — and after a focused offseason in the weight room, she’s the one not getting hurt.

Strong kids stay in the game. It’s that simple.

Confidence That Translates Beyond the Weight Room

There’s a moment we see every summer. A kid walks in convinced she can’t lift the empty bar. Her shoulders are rolled forward. She won’t make eye contact with the coach. She’s been told, by who knows how many people, that she’s not strong, not athletic, not the kind of kid who does this stuff.

A few weeks later she’s adding plates and grinning about it. That kind of confidence — earned, not given — doesn’t stay in the weight room.

This is the part that surprises parents most. They sign their kid up expecting to get a stronger athlete back. What they often get is a different human being. A kid who tries the harder math problem instead of giving up. A kid who raises her hand in class. A kid who walks into the cafeteria with her chin up.

Strength training teaches young people one of the most important lessons available to them: hard things are doable, and you are capable of more than you think. That lesson, learned in the weight room at twelve or thirteen, becomes the operating system they bring to everything else. We didn’t build that. They built it. We just gave them the room to do it.

A Movement Foundation for Life

Walk into a public middle school gym class and watch kids try to do a basic squat. Most can’t. Hips collapse, knees cave, heels lift, and what should be one of the most natural movements in the human body looks like a struggle.

This is what specialization without foundation looks like. Kids today often have great skill in their primary sport and terrible movement quality in everything else. They’re powerful at one specific thing and fragile at everything around it.

Strength training, properly programmed for young athletes, fixes this. We’re teaching them to squat, hinge, push, pull, lunge, carry, and rotate — the fundamental human movement patterns. Not because we want them to become powerlifters, but because these patterns underlie every athletic action they’ll ever do, in every sport, at every level, for the rest of their lives.

A kid who can squat well is a kid who can jump higher and land softer. A kid who can hinge is a kid whose hamstrings won’t blow out in their first sprint. A kid with a real overhead press is a kid whose throwing shoulder has a chance. We’re not building champions in eight weeks. We’re building the movement vocabulary they’ll use for the next sixty years.

Habits That Outlast Athletic Careers

Here’s a number worth sitting with. The vast majority of young athletes — over 95 percent — will not play their sport in college. The high school senior whose entire identity is wrapped up in being a soccer player or a baseball player is, in two years, going to be a college freshman with no team and a body that’s used to being trained.

What happens next is one of the great unspoken stories of youth sports. Kids who never learned to train — only to be coached in their sport — quietly stop being active. The weight comes on. The energy fades. The body that used to do everything starts to feel foreign.

Kids who learned to strength train, who built that habit at twelve or fifteen, walk into adult life with a tool they’ll use forever. They know how to move. They know how to push themselves. They know what it feels like to set a goal in the gym and hit it.

That’s not an athletic benefit. That’s a life benefit. And it’s quietly the most important thing strength training gives a young person.

When Should Kids Start Strength Training?

This is the second-most-common question we get, and the answer surprises people: earlier than you think.

The old rule of thumb — “wait until they’re sixteen” — has no basis in science. Research has shown clear benefits, with no measurable risks, from properly programmed strength training in kids as young as seven or eight.

That doesn’t mean a seven-year-old should be deadlifting. It means a seven-year-old can absolutely benefit from learning to do bodyweight squats, push-ups, planks, and basic movement patterns under coaching. That’s strength training. The barbell comes later.

A reasonable progression looks something like this:

Ages 7–9: Movement-focused training. Bodyweight exercises, games, learning the basic patterns. This is the time to fall in love with moving well.

Ages 10–12: Light external loading begins. Dumbbells, medicine balls, light barbells. Heavy emphasis on technique, not weight. This is the foundation phase, and what we focus on with our 10–13 youth group.

Ages 13–15: Real strength training. Progressive overload, structured programming, more sport-specific work. This is the phase where the biggest physical gains happen, and it’s the focus of our 14-and-up group.

Ages 16+: Full training. The same kind of program an adult would follow, with intensity and complexity dialed up.

The key isn’t age. It’s coaching. A nine-year-old with a good coach is better off than a fifteen-year-old in a chaotic gym with no supervision.

What Proper Youth Strength Training Looks Like

If you’re going to put your kid in a strength program, you should know what good looks like — and what to avoid.

Good youth strength training has a real coach in the room. Not a video. Not a teenager hired for the summer. Someone with credentials, experience, and a track record working with young athletes.

It programs by age and ability, not by what’s trendy. A nine-year-old’s session should not look like a fifteen-year-old’s. Both should look completely different from a college athlete’s.

It prioritizes technique over weight. Always. There is no rep, no PR, no cool-looking lift that justifies bad form in a developing body.

It includes mobility, balance, and movement quality. Not just the lifts, but the foundation underneath them.

It builds slowly. Real progress in young athletes is measured in months and years, not weeks. Coaches who promise dramatic transformations in eight weeks are selling something, not coaching something.

It communicates with parents. You should know what your kid is doing and why.

Red flags to avoid: programs that emphasize maxing out or “testing” young kids, group sessions with one coach for thirty kids, coaches without certifications, programs that look like adult workouts with the weights lowered, and anyone who promises specific outcomes — “He’ll add ten miles per hour to his fastball” — is not running a serious program.

The right environment matters more than any single exercise. A program where coaches actually see your kid, know your kid, and adjust to your kid will outperform a flashier program every time.

Sport-Specific Benefits of Strength Training

Whatever sport your athlete plays, strength training improves it. Period.

Baseball and softball players gain rotational power and shoulder durability. Pitchers throw harder and hurt less. Hitters drive the ball further. Fielders cover more ground.

Football players gain the strength to absorb contact and the power to deliver it. They also build the neck and shoulder strength that meaningfully reduces concussion risk.

Soccer players gain the lower-body strength that prevents the ACL injuries that end so many young careers. They also gain the speed that comes from being able to put more force into the ground.

Volleyball and basketball players jump higher, land softer, and develop the shoulder durability that overhead sports demand.

Swimmers gain the strength to translate their pool work into faster times. Swimming alone doesn’t build the muscular foundation needed for elite swimming.

Track athletes — sprinters, jumpers, throwers — get the most direct benefit. Strength is the input. Speed and power are the outputs.

Tennis, golf, lacrosse, gymnastics, and dance have all been studied, and in every one, athletes who do supplemental strength training perform better and get hurt less than athletes who don’t.

There is no sport where the answer is “skip the weight room.” There are only sports where coaches haven’t figured that out yet.

Common Questions Parents Ask About Youth Strength Training

1. Is it safe for girls to lift? Absolutely. The benefits are if anything greater for young female athletes. ACL injuries are dramatically more common in young women, and strength training is the single most effective intervention we have to prevent them. Girls who lift do not “bulk up” in the way the old myths suggested. Female athletes need the gym every bit as much as their male counterparts.

2. My kid is small for her age. Will lifting hurt her? No. Body size is not the relevant variable. Coaching is. A small twelve-year-old and a big twelve-year-old should follow different programs, but both can train safely and benefit equally.

3. Will it make my kid muscle-bound or slow?. No. This is another myth that has been thoroughly debunked. Properly programmed strength training improves speed, agility, and athletic performance. The “muscle-bound” stereotype came from a very specific kind of training and has nothing to do with what athletes actually do in the gym.

4. My kid plays a year-round sport. Should they still strength train? Especially then. Year-round single-sport athletes are the highest-risk group for overuse injuries, and the protective effect of strength training is most valuable for them. Even one or two sessions a week makes a meaningful difference.

5. How long until I see results? You’ll see strength gains within four to six weeks. Real changes in athleticism — speed, jump height, durability — show up over a season. The biggest benefits compound over years.

6. What if my kid doesn’t want to do it?

   The right environment changes this. Most kids who say they don’t want to lift are reacting to a mental image of solitary, intimidating gym work. Put them in a group of peers, with a coach who knows how to make it fun, and the resistance usually disappears within a session or two. Kids want to do hard things in good company. The job is to give them the company.

The Bottom Line

Twenty years of coaching has taught us something simple. The kids who train — really train, with real coaches, in real programs — turn out different. They get hurt less. They play longer. They walk taller. They carry confidence and capability into every other part of their lives.

The myths about youth strength training are exactly that: myths. The science has been clear for decades. The question isn’t whether your kid should lift. The question is who they’re going to do it with.

Whether your athlete trains with us at P.R.I.D.E. Strength Training in Tampa or somewhere else, get them in a weight room with a real coach this spring. They’ll thank you for it later. So will their college team. So will their forty-year-old self.

This May, our P.R.I.D.E. Youth Strength & Performance Camp runs Monday, Tuesday, Thursday, and Friday — ages 10–13 from 10:00 to 11:30 AM, ages 14 and up from 12:00 to 1:30 PM. Every session is run by coaches who’ve done this work for two decades.

If you have questions, call the gym at 813-543-1300, or come by 13335 W. Hillsborough Ave in Tampa. We’d love to meet your athlete.

The weight room is waiting. So is your kid’s stronger version of themselves.