Young Athlete Development: How Junior Runners Should Really Train

The Late Developer's Proof

I am walking evidence that the junior years do not decide the athlete. I was not a child prodigy. I did not run for a club at 12, I never won an English Schools title — I did not start running seriously until I was 25. I went on to run a 2:17 marathon, win the Edinburgh Marathon and represent Great Britain at the European Championships and Commonwealth Games.

The aerobic system does not care when you start. It cares that you build it patiently, for years, without breaking. A teenager who arrives at 20 healthy, uninjured and hungry has everything ahead of them. A teenager who arrives at 20 with five years of overuse injuries and no love left for the sport has almost nothing — regardless of what they won at 14.

Junior titles are not the currency. Healthy years of development are.

The Specialisation Trap

The pattern is depressingly familiar to anyone around junior athletics. A talented 12-year-old wins locally. The family and coach respond with more running: more sessions, more mileage, more races, fewer other sports. By 15 they are training like a small adult. By 17 they are injured, stagnating or gone.

The research on early specialisation says what experienced coaches have always seen: children who focus on one sport early get injured more and drop out more, and they hold no advantage at senior level over multi-sport kids who specialised later. The age-group results they chased are the least transferable results in the sport — much of what wins at 13 is early physical maturity, which the field catches up with by 18.

Football, swimming, gymnastics, basketball, cricket — every sport a young runner plays is depositing coordination, speed and robustness that running alone cannot provide. Nothing meaningful is lost by specialising at 16 instead of 12. A great deal can be lost the other way round.

What Juniors Should Actually Train

A good junior programme does not look like a shrunken marathon plan. It looks like this:

• Speed first. Childhood and early adolescence are when the nervous system is most trainable. Relays, sprints, strides, short hills — fast, fun, fully recovered. This is the window adult training can never reopen.
• Aerobic work disguised as play. Cross country in winter, fartlek in the park, group runs with mates. Time on feet, not mileage targets.
• Skills and strength through movement. Bounding, skipping, circuits, body-weight work, other sports. The gym can wait; movement quality cannot.
• Racing across distances. An 800m one week, cross country the next. Racing is a skill and variety builds it — no junior should be "a 3000m specialist".
• Two to four run sessions a week for most ages, with volume creeping up only in the late teens — and only if the athlete is healthy and keen.

Notice what is missing: threshold blocks, double days, weekly mileage totals. Structured intensity has a place in small doses from the mid-teens, but the engine-building years — the Lydiard work — belong to the late teens and twenties, when growth is finished and the tendons can carry it.

Training Through Growth

The growth spurt is where promising juniors get broken. Bones lengthen faster than muscles and tendons adapt, coordination temporarily deserts them, and growth-plate tissue is vulnerable in exactly the years when enthusiasm peaks. Heel pain (Sever's) and knee pain (Osgood-Schlatter) in a growing runner are not things to push through — they are the body asking for the load to drop.

Two rules keep young athletes safe through this window: reduce, don't gut through when growth-related pain appears, and judge nothing during the spurt. The awkward 14-year-old who has just grown four inches and lost every race this season is often the same athlete who dominates two years later. Patience here is a competitive advantage.

What Parents Can Do

The best thing a parent of a young runner can do costs nothing: keep the sport theirs. Drive them to training, watch the races, ask "did you enjoy it?" before "where did you come?" The athletes who last are the ones whose motivation was always their own.

Practical support matters too — sleep and food during growth years move performance more than any session, and a coach who talks openly with the family about long-term development (rather than this season's championships) is worth more than any facility. I've seen this from both sides, treating young athletes in the clinic and advising their parents: the question that matters is never "how do we win next month?", it is "is this athlete still on track to be running, healthy and improving at 22?"

If you have a young runner dealing with a recurring niggle, a proper look at the cause — technique, load, growth — beats resting and repeating. That assessment-first approach is exactly how I work with sports massage and treatment clients of all ages.

Final Thoughts

Youth development is the clearest example of the principle that runs through all my coaching: the plan serves the athlete, not the other way round. Different children grow, mature and respond at wildly different rates. The programme that made one junior a champion will break the next one.

Train speed while it is cheap. Build the engine when the body is ready. Keep it fun beyond everything else. The results arrive later than you would like — and they last far longer.