When Can Kids Start Lifting Weights?

A Pediatrician’s Guide to Safe Strength Training for Children and Teens

At Park Pediatrics in Gaithersburg MD, Greenbelt MD, and Takoma Park MD, we love when young people bring great questions to the table — and this blog post is actually inspired by my own son, who asked:

“When is it safe for kids to start lifting weights?”
He and his friends were curious, and chances are, you or your child have wondered the same.

Let’s break it down.

Is It Safe for Kids to Lift Weights?

Yes — with proper supervision and age-appropriate training, strength training can be a safe and healthy activity for children and teens. In fact, it can:

• Increase bone density
• Improve balance and coordination
• Boost self-confidence
• Reduce risk of sports injuries
• Support healthy weight management

And no — weightlifting does not stunt growth. That’s an old myth that’s been thoroughly debunked by pediatricians and sports medicine experts.

What’s the Right Age to Start?

It all depends on your child’s maturity, physical development, and ability to follow instructions — but here’s a general guide:

Ages 7–10:
Children can start learning bodyweight exercises like squats, lunges, push-ups, and planks.
Light resistance using bands or medicine balls is okay. The goal is to learn form and movement, not to build muscle mass.

Ages 11–13:
Preteens can begin more structured strength training using light dumbbells or weight machines, under supervision.
They should focus on higher reps (10–15), light resistance, and perfecting technique.

Ages 14 and Up:
Teens can gradually advance to traditional weight training programs, including progressive overload (gradually increasing resistance).

Still, supervision is key, and workouts should never include “maxing out” or trying to lift excessively heavy weights without support.

Common Mistakes to Avoid

Parents and teens should steer clear of:

• Copying adult fitness programs or influencer workouts
• Lifting too much weight too soon
• Skipping warm-ups and rest days
• Lifting unsupervised or without guidance

Strength training should always be part of a well-rounded fitness routine — one that includes cardio, flexibility, and recovery.

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