Last reviewed: September 29, 2026

Most children do better playing several sports, at least until puberty. Too much of any one sport may raise the risk of overuse injury.

Specializing means training in one sport year-round and giving up others. In reviews of the studies, children who specialized had more overuse injuries than children who played several sports. Most of these studies asked children about past injuries, so they show a link, not proof of cause. The results are not all the same. In some studies, only year-round play or skills camps went with more injuries.

Part of the risk seems to come from the total amount of sport. In a US study that followed more than 10,000 young people, total weekly hours of hard exercise predicted injury in both boys and girls. Girls who specialized had more injuries. Several studies have linked two patterns to overuse injury. One is more hours a week of organized sport than the child’s age in years. The other is more than twice as many hours of organized sport as of free play. Playing one sport more than eight months a year has also been linked to overuse injuries.

The American Academy of Pediatrics advises playing several sports until at least puberty. It advises at least one to two days off a week from the main sport, and at least three months off a year from it, in blocks of a month. It notes that gymnastics, figure skating and diving may need earlier specialization, because athletes in those sports peak before they are fully grown.

Specializing early does not appear necessary to reach the top in most sports. In a review of more than 6,000 athletes, adult world-class athletes had played more sports as children and started their main sport later than national-level athletes. Early specializers tended to do better as youths, but not as adults. Norway’s sport rules do not allow national championships for children before age 13, or rankings before age 11. No study has shown whether those rules explain Norway’s Olympic results.

In general:

  • Compare your child’s weekly hours of organized sport with their age in years.
  • Keep time for free play and for other sports.
  • Pain that keeps coming back in the same spot is worth having checked.

Drafted with AI assistance from published sources, reviewed and edited by Babak Sheikh, MD.

Sources:

This is general information about what published research shows. It is not medical advice and it is not about your situation. Reading it does not create a doctor-patient relationship with me. I am a retired orthopedic surgeon and I do not see patients. Talk with your own doctor before changing anything about your care. If something feels suddenly or seriously wrong, get medical care promptly rather than waiting.

This page is provided as is. I make no guarantee that it is accurate, complete or current, and medical evidence changes. Use of it is at your own risk.

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