Strength training safely as a teenager
Physical Education · Key Stage 3 · The School
The growth myth
A common claim is that lifting weights stunts a teenager's growth. This is not supported when training is age-appropriate, supervised, and technique-focused. It is one of the most persistent myths in youth sport, repeated far more often than it is checked.
What actually is risky
The genuine risks are POOR TECHNIQUE under load, adding weight FASTER than technique can handle, and training WITHOUT supervision from someone who can correct a mistake before it becomes a habit or an injury. All three are about how training is done, not about strength training as an activity.
Technique before load
The recommended order is: master the movement with just body weight, then add a small amount of load only once that movement is consistently correct. A perfect bodyweight squat is worth more than a loaded squat with poor form — the load should wait for the technique to be ready for it.
WEEK 1–2: bodyweight squats, press-ups on the knees, and planks, focusing only on the shape of the movement. WEEK 3–4: the same movements, more repetitions, still no added weight. WEEK 5 onward, ONLY if technique has been consistently correct and a coach agrees: a light external load is added, and the repetitions drop back down while the new load is learned. Skipping straight to added weight in week one is the actual risk, not the weight itself.