Should kids lift weights?

I’ll be honest about something. I’ve seen the quickest way to build athleticism, power, and balance in a young athlete. It translates directly to bat speed and running times. And I’m often afraid to even bring it up with parents.

It’s lifting weights.

The minute “weights” and “10-year-old” land in the same sentence, a lot of parents tense up. They’ve heard it stunts growth. They’ve heard it wrecks growth plates. They’ve heard kids should just play and get strong later.

I get why people believe it. It’s been repeated for decades. But it’s wrong.

So here’s my answer: yes. Kids should lift, when it’s coached well. And by “lift” we mean more than barbells. A sled, a water log, a medicine ball: load is load. Kids get stronger, faster, and more coordinated by moving something heavy, fast, and well.

Here’s why.

The myths, and what the research actually says

The people who study this for a living settled the question a long time ago. The American Academy of Pediatrics and an international panel of sports scientists have both said the same thing: supervised resistance training is safe and good for kids.

Myth: lifting stunts growth. There is no evidence that resistance training hurts growth or maturation in kids or teens. Kids who lift don’t end up shorter. The stunted-growth story has been around for decades. The research never backed it up.

Myth: lifting damages growth plates. In research studies that followed kids through supervised training programs, not one growth plate injury has been reported. The growth plate injuries people point to came from kids maxing out unsupervised, using bad form, or dropping weights at home. That’s not training. That’s horsing around in a garage.

Myth: it’s more dangerous than other sports. It’s less. In one study, resistance training accounted for 0.7% of youth sports injuries, compared with about 19% for football and 15% for basketball. Another found 0.012 injuries per 100 hours of resistance training, compared with 0.8 for rugby. Your kid is far more likely to get hurt sliding into second than doing a coached squat.

Myth: he’s too young. The experts put it simply: if a child is ready for sports, generally age 7 or 8, he’s ready for some type of resistance training. The AAP says even 5-year-olds build strength through things like hops and frog jumps. What matters most isn’t age. It’s training age: how long a kid has been learning to move well under coaching.

The real risk isn’t the barbell. It’s bad coaching, ego lifting, and no supervision. Fix those and the risk drops to almost nothing.

Why strength matters for a baseball player

Baseball looks like a skill sport. It is. But every one of the five tools sits on top of force.

Hitting the ball hard, throwing it hard, and running fast all come from the same place: pushing into the ground and moving that force through the body fast. A stronger kid can produce more of it. A kid who has learned to produce it quickly can use more of it.

• Bat speed and exit velocity. Swing mechanics steer the force. Strength is how much force there is to steer. We’ve watched several of our players go from hitting the ball 45–50 mph as 9-year-olds to 65+ mph as 11-year-olds. Instruction and reps built the swing. Strength put more behind it.
• Throwing velocity. In one study of 11- to 15-year-old baseball players, just four weeks of resistance training plus a throwing program raised throwing velocity from about 56 to 58 mph. The group that didn’t train didn’t move.
• Speed. Sprinting is force into the ground. Stronger legs, faster first step. You can’t coach a kid into a faster 60 if he doesn’t have the strength to push.
• Staying healthy. This might be the biggest one. A 2014 review of 25 studies and more than 26,000 athletes found strength training cut sports injuries to less than a third. Overuse injuries were almost halved. For pitchers, that’s the whole ballgame.

What we load, and why

We’re not anti-barbell. The research above applies to barbells as much as anything else, and kids who learn to squat and hinge well under a bar have a real head start in high school. We use barbells and dumbbells. We just use them sparingly.

Most of our power and speed work loads movement in other ways:

• Water logs. A tube partly filled with water. The water sloshes, so a kid has to brace and control it through the whole rep. That teaches the trunk to stay stable while the arms and legs move, which is exactly what happens in a swing or a throw.
• Sleds. Push it, pull it, sprint with it. There’s almost no learning curve, it’s hard to do wrong, and it builds acceleration: the first step out of the box and the jump on a ball.
• Medicine balls and pummel balls. Thrown, slammed, rotated. Rotational power is the engine of hitting and throwing, and a kid can throw a med ball as hard as he wants.
• Hurdle hops, skaters, and explosive push-ups. Bodyweight moved fast. Springy athletes are fast athletes.

Why this way? Two reasons.

First, these tools build coordination along with strength. A kid has to organize his whole body to move a load that shifts or slides, and that’s the skill baseball asks for.

Second, honestly, it keeps the conversation about the kid. Some parents hear “barbell” and stop listening. For a young player, a sled or a water log gets the same job done, and nobody has to win an argument first.

As players get older and their training age goes up, the barbell becomes a bigger part of the picture.

How we do it at Gorilla

Every strength and power session we run follows a few rules:

• Technique before load. Nobody adds weight until the movement is clean.
• Power, not cardio. Our power development work runs in short, all-out bursts of 12 to 15 seconds with full rest between sets. The goal is to move fast and hard, not to get tired. A winded kid isn’t producing power.
• Track everything. Players record their reps and try to beat them next time. That’s how a 10-year-old learns that hard work turns into a number going up.
• Coached, not just supervised. A coach runs every session, and older players teach younger ones. Teaching is learning.

How it builds by age:

1. Ages 8–10: learn to move. Bodyweight work, jumps, medicine ball throws, light sled pushes. Lots of games and variety.
2. Ages 11–12: load the movement. Water logs, heavier sleds, more medicine ball power, and an introduction to the basic patterns with dumbbells and light bars.
3. Ages 13–14: get strong. More load on the main patterns, barbells and dumbbells included, paired with jumps, throws, and sprints so strength turns into speed and power.
4. High school: train like an athlete. A full strength and power program built around the season, on a foundation he’s been building for years.

What parents should look for

Not every strength program for kids is a good one. Before you sign up anywhere, ours included, ask:

• Do they teach before they load? A good program can tell you exactly how a kid earns more weight.
• Do they track progress? If nobody writes anything down, nobody knows if it’s working.
• Is it built for baseball? Strength, speed, power, and rotation. Not a bodybuilding split for a 12-year-old.

And at home: no maxing out in the garage, no YouTube challenges, no lifting without someone who knows what they’re doing. Almost every horror story you’ve heard started there.

The bottom line

Should kids lift weights? Yes. Coached, progressed, and done right, it’s one of the safest and most useful things a young athlete can do.

The kids who learn to train early don’t just get stronger. They learn how to move, how to work, and how to see progress. By the time their high school teammates are walking into a weight room for the first time, they’ve been doing it for years.

We believe in athletes first. Strength, speed, and movement, then the baseball skills on top of that. Loading movement, with a sled, a water log, a med ball, or a bar, is how we build it.

Further reading

• Guidance on Resistance Training for Children (American Academy of Pediatrics, HealthyChildren.org)
• Position statement on youth resistance training: the 2014 International Consensus (British Journal of Sports Medicine)
• The effectiveness of exercise interventions to prevent sports injuries (British Journal of Sports Medicine, 2014)
• Effects of a 4-week youth baseball conditioning program on throwing velocity (Journal of Strength and Conditioning Research)