Youth concussion: what the evidence says about returning to play and school

A child or teenager with a suspected concussion should be taken out of the game and not returned to play on the same day, then guided back to school and sport in stages [s1]. What has changed is the advice for the days that follow: prolonged strict rest in a dark room is no longer supported, and a growing evidence base shows that carefully dosed light activity within the first week can actually shorten recovery [s3]. Concussion is a serious injury, but the modern approach is graduated activity, not shutdown.

What a concussion is, and the first rule

A concussion is a mild traumatic brain injury caused by a blow to the head or body that transmits force to the brain. Emergency-department visits for paediatric mild traumatic brain injury rose markedly over the decade before the United States published its first evidence-based guideline on the condition, a sign of both rising incidence and rising recognition [s2].

The single most important step is immediate: a young athlete with a suspected concussion is removed from play and not allowed to return the same day [s1]. The international consensus process behind that rule, run by the Concussion in Sport Group, held its sixth conference in Amsterdam on 27 to 30 October 2022 and was informed by 10 systematic reviews of the evidence conducted over three and a half years [s1]. It also produced the assessment tools clinicians and sideline staff now use, including the Concussion Recognition Tool 6 and child versions of the Sport Concussion Assessment Tool (Child SCAT6) and office assessment tool (Child SCOAT6) [s1].

When imaging is, and is not, needed

A frequent parental question is whether a child needs a brain scan. The US paediatric guideline, published in JAMA Pediatrics, issued 19 sets of recommendations covering diagnosis, prognosis and management, each graded by how strong the evidence is [s2]. Its diagnostic recommendations cover imaging, symptom scales, cognitive testing and standardised assessment — and a central theme is that routine CT scanning is not warranted for most children with mild head injury, because the small chance of a serious finding rarely justifies the radiation exposure [s2]. Validated decision rules, not reflex scanning, are how clinicians decide who needs imaging.

The shift away from strict rest

For years the standard advice was near-total rest until symptoms cleared. The evidence has moved. The clearest single piece comes from a randomised trial of 103 adolescent athletes aged 13 to 18 who presented within 10 days of a sport-related concussion [s3]. They were assigned to either individually calibrated sub-symptom-threshold aerobic exercise — roughly 20 minutes a day at an intensity that did not worsen symptoms — or a placebo-like stretching programme [s3].

The exercise group recovered in a median of 13 days (interquartile range 10 to 18.5) compared with 17 days (interquartile range 13 to 23) for the stretching group, a statistically significant difference (P=0.009) [s3]. Delayed recovery, defined as taking 30 days or more, occurred in 2 of the exercise participants (4%) versus 7 (14%) in the placebo group, a difference that did not reach significance (P=0.08) [s3]. This was the first randomised trial to show that prescribed light exercise in the first week speeds recovery rather than harming it [s3]. Consistent with that, current guidance allows a brief initial period of relative rest of only a day or two before a gradual, symptom-guided return to activity [s1].

Return to learn, then return to play

The staged approach applies to the classroom as much as the field. Guidance places return to school before full return to sport, using a stepwise increase in cognitive and physical load in which a child moves up a level only if symptoms do not flare, and steps back if they do [s1][s2]. The principle is the same throughout: activity is titrated to symptoms, and full-contact sport is the last step, not the first.

Our coverage of the social factors that shape concussion recovery explains why two children with the same injury can recover at different rates, and our review of ADHD and concussion risk and recovery covers a group that may need extra attention.

How to read this without overreaching

The evidence supports a clear structure: remove from play immediately and do not return the same day; avoid unnecessary scans; rest only briefly; then rebuild school and sport in symptom-guided steps [s1][s2][s3]. The exercise trial was modest in size, studied a specific age band and used supervised, individually set intensities rather than unstructured activity, so it is not a licence to push through symptoms [s3]. Younger children were not its subject, and recovery timelines vary.

This article is informational and is not medical advice. It does not tell any family when a specific child should return to school or sport; those decisions should be made with a qualified clinician following a proper assessment.