Does Lifting Weights Stunt a Teenage Boy's Growth?

By The Growth Path Editorial Team · Reviewed September 2026

No. This myth has been thoroughly debunked. Properly supervised strength training does not stunt growth and may actually support healthy development. Here is where the myth came from and what the research actually shows.

The short answer

Strength training under proper supervision does not stunt growth. Every major pediatric and sports medicine organization (American Academy of Pediatrics, National Strength and Conditioning Association, American College of Sports Medicine) supports resistance training for adolescents when done with age-appropriate form, load, and supervision.

Where the myth came from

Two things fed the myth:

1. Real growth-plate injuries in the 1970s-80s. When adolescent Olympic weightlifting programs pushed young athletes with excessive loads and poor supervision, growth-plate fractures did happen. These were the result of specific bad practices (loads too heavy, form breakdown, insufficient recovery), not weightlifting itself.
2. Observation of short adult weightlifters. Elite weightlifters tend to be shorter, but this is selection, not causation. Shorter athletes have biomechanical advantages in the sport, so they end up in it, not because they got shorter from lifting.

What the research actually shows

Multiple systematic reviews of youth resistance training programs, including thousands of adolescent participants, find:

• No effect on final adult height.
• Improved bone mineral density.
• Reduced injury risk in youth sports overall.
• Improved athletic performance and body composition.
• No increase in growth-plate injury risk when programs are supervised.

What CAN affect growth in adolescent lifters

• Inadequate calorie intake during the growth spurt. Undernutrition slows growth regardless of exercise type.
• Overuse injuries from poor recovery or excessive volume.
• Serious growth-plate injury from a specific accident (heavy load dropped, catastrophic form failure). These are rare with proper coaching.
• Chronic anabolic steroid use. Steroids CAN close growth plates prematurely, and this is a real risk to warn teens about.

How to do it right for a teenage boy

1. Learn form on light weights first. A qualified coach matters. Look for CSCS (Certified Strength and Conditioning Specialist) credentials or equivalent.
2. Progressive overload with age-appropriate loads. General guideline: sets of 8-15 reps with a weight he can control through full range of motion.
3. Adequate recovery. 48+ hours between sessions for the same muscle group. Sleep 8-10 hours.
4. Eat enough. Calories and protein must match the training load. Undernutrition is a real growth risk, not the lifting itself.
5. Avoid one-rep max attempts before growth plates close (usually late teens). No need for singles at this age.
6. No steroids. This is the one thing that actually can stunt growth.

What actually helps growth

Nothing "makes" a boy grow beyond his genetic potential, but the following support hitting that potential:

• Sleep (growth hormone peaks in deep sleep).
• Adequate calories and protein.
• Treating any chronic conditions affecting growth.
• Physical activity in general (weightlifting is fine).

Height data uses the CDC 2000 Growth Charts for boys. This page is parent education, not medical advice or diagnosis. If you have concerns about your son's growth, talk to his pediatrician, ideally with 6-12 months of measurements in hand. © 2026 The Growth Path.