The UK Concussion Return to Play Protocol Explained - Every Stage, Every Rule

Key takeaways

• The UK Grassroots Concussion Guidelines (November 2024 update) require a minimum 21-day stand-down for under-18s before returning to full contact.
• Adults follow a minimum 14-day stand-down, provided they are symptom-free before progressing.
• The graduated return to play (GRTP) has six distinct stages; no stage can be skipped.
• "Symptom-free" is not the same as "ready to play." Physiological recovery continues after symptoms resolve.
• A qualified clinician must sign off return to contact, not a coach or parent.
• Documentation at every stage is not optional; it is the audit trail that demonstrates duty of care.

The UK graduated return to play (GRTP) protocol is the most important procedure any coach, PE teacher or welfare officer needs to understand about concussion management. Yet it is also one of the most consistently misread. Coaches confuse elite protocols with grassroots ones. Parents assume "feeling fine" is clearance. Schools lose the paperwork. This article sets the record straight on what the UK Grassroots Concussion Guidelines actually require, stage by stage, and why the rules exist in the language they do.

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What does "graduated return to play" actually mean?

Graduated return to play (GRTP) is a structured, step-by-step protocol that moves a concussed athlete from rest back to full competitive contact over a minimum number of days. Each stage increases the physical and cognitive load placed on the brain. The principle behind it is straightforward: the recovering brain needs time to restore normal blood flow, metabolic function and autoregulation before it is subjected to the demands of sport again.

The phrase "graduated" matters. There is no shortcut. A player cannot jump from stage one to stage five because they feel well. The Luca Safe Concussion Framework implements this sequenced approach as a documented, operational standard, meaning every stage is logged and reviewable.

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Which protocol applies to your fixture?

Before going any further, one distinction must be made clearly. There are two different concussion protocols in use in UK rugby and other contact sports: the elite Head Injury Assessment (HIA), used by professional and international rugby under World Rugby Regulation 17, and the Graduated Return to Activity and Sport (GRAS) protocol, used at community and grassroots level.

If you are a coach, teacher or welfare officer working in school or community sport, the elite HIA is not your framework. The UK Concussion Guidelines for Grassroots Sport (Sport and Recreation Alliance, November 2024 update) are your reference document, and the GRAS protocol is the procedure you follow.

Conflating the two causes real harm. The HIA, for example, allows a player to return to the same game if a temporary substitute shows no signs of concussion within a defined assessment window. No such provision exists in grassroots and school sport. Any player with a suspected concussion in community or school sport must be removed immediately and must not return to play on the same day. Full stop.

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What are the six stages of the UK GRAS protocol?

The November 2024 UK Grassroots Guidelines set out a six-stage return to activity and sport. Each stage must be completed without the return of symptoms before moving to the next. If symptoms return at any stage, the player steps back to the previous stage and the clock does not simply restart from that point; the progression is re-evaluated.

Stage 1: Symptom-limited rest The player rests until they are completely symptom-free at rest. This is not bed rest; current guidance from the CISG 6th Consensus Statement (2023) recommends that strict cognitive and physical rest beyond 24-48 hours is not beneficial. Light activity that does not aggravate symptoms is acceptable. Screen time, homework and other cognitively demanding tasks should be reduced, not eliminated.

Stage 2: Light aerobic exercise Walking, swimming or stationary cycling at low intensity. No resistance training. No head-impact risk. The purpose is to increase heart rate and assess whether exertion provokes symptoms. Duration is typically 15-20 minutes.

Stage 3: Sport-specific exercise Running drills, sport-specific movement patterns, skating circuits. No contact. No headers. No set-piece work in rugby. The player is in sport-specific motion but in a controlled, contact-free environment.

Stage 4: Non-contact training drills The player reintegrates with teammates. Passing drills, skill work, ball-handling. Still no contact. A coach can observe how the player is coping with decision-making under mild pressure, which is itself a cognitive demand. This is also the stage at which a clinician review before progression is strongly recommended.

Stage 5: Full-contact training This stage requires medical clearance before it begins. The player participates in full practice, including contact elements. This is the first point at which the sport's normal physical demands are replicated.

Stage 6: Return to competition The player is cleared to play competitive matches.

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Why 21 days? Where does the minimum come from?

The 21-day minimum stand-down for under-18s is one of the most-questioned rules in grassroots concussion management. It feels arbitrary. It is not.

The neuroscience underpinning it relates to what researchers call the neurometabolic cascade. When a concussion occurs, the brain undergoes a period of ionic imbalance, mitochondrial dysfunction and altered cerebral blood flow. The hallmark of this phase is that the brain has elevated energy demand at precisely the moment it has reduced blood glucose delivery. This mismatch, described in research published in the Journal of Neurotrauma, can persist well beyond the point at which symptoms resolve. In a developing brain, this window is longer and the vulnerability is greater.

The CISG 6th Consensus Statement (2023) explicitly notes that children and adolescents typically have a more prolonged recovery than adults, and that paediatric-specific stand-downs are justified on neurobiological grounds, not merely as a precaution.

Adults (18 and over) follow a shorter minimum: 14 days from the date of the concussive event, provided they are symptom-free before beginning stage progressions. The 21-day minimum for under-18s is not a rounding-up of the adult figure. It reflects a different underlying recovery profile.

The minimum is a floor, not a target. If a player has ongoing symptoms at day 21, they do not progress. The timeline is driven by symptoms and stage completion, with the minimum as the earliest possible return to contact.

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How is the paediatric protocol more conservative?

The UK November 2024 guidelines are more conservative for under-18s in three specific ways beyond the extended minimum stand-down.

First, the symptom-free requirement at rest is applied more strictly. A teenager who reports "mostly fine" but still has occasional headache on exertion has not met the symptom-free threshold for stage progression.

Second, return to contact at stage five requires medical clearance from a qualified clinician regardless of how uncomplicated the concussion appeared. For adults in community sport, the guidance strongly recommends clearance but the operational reality is that many clubs lack access to a clinician. For under-18s, the expectation is firmer.

Third, return to learning must precede return to sport. This is not just a pastoral nicety. The November 2024 guidelines, consistent with the CISG 6th Consensus, make explicit that a pupil should not be progressing through sport-specific stages while still receiving academic accommodations for concussion symptoms. The two pathways, return to learn and return to sport, are sequenced, not parallel.

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Who signs off return to contact, and what does "clearance" actually mean?

Medical clearance for return to contact must come from a clinician qualified to assess concussion: a sports physician, physiotherapist with relevant expertise, or GP with access to the player's recovery history. It does not come from the coach. It does not come from a parent. And it does not come from the player declaring themselves ready.

"Clearance" means a qualified clinician has reviewed the player's symptom history across all stages, confirmed symptom resolution at rest and with exertion, and judged that progression to stage five is appropriate. The clinician should be provided with documented stage completion records, not a verbal summary.

This is where the Luca platform's structured documentation makes a practical difference. Each stage is timestamped, symptoms are logged at each transition, and the clinical review request is generated automatically at stage four. The paperwork that supports the clearance decision is complete before the clinician picks up the phone.

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What happens when a player fails a stage?

Stage failure means symptoms return during or after a stage. The player steps back to the previous stage. They rest until symptom-free again. They then reattempt the stage.

If symptoms return repeatedly, or if a player fails to progress beyond stage two or three within a reasonable timeframe, clinical re-assessment is warranted. This is not a cause for alarm in isolation. Persistent symptom recurrence after exertion is the clinical picture that triggers GP referral and potentially onward referral to a sports medicine physician or neurologist.

UK guidance does not set a fixed timeframe after which re-assessment is mandatory, because recovery is individual. The practical rule is: if you are not seeing forward progress within a week of restarting a stage, get clinical input.

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What documentation is required at every stage?

Every stage completion must be recorded. The minimum record for each stage is:

• Date and time of stage attempt
• Activity completed (specific, not generic)
• Duration
• Symptoms reported before, during and after
• Outcome (pass or fail)
• Name of supervising adult

The overall concussion record should also include the date of the incident, the mechanism of injury, who was present, who was notified (parents, school nurse, head of sport), and the date and name of the clinician who provided clearance for stage five.

This record is a safeguarding document. Under the principles of KCSIE (Keeping Children Safe in Education), schools have a duty to maintain records that demonstrate a proportionate and documented response to safeguarding concerns. A concussion in a pupil is a safeguarding matter. The absence of a documented GRTP record is, in effect, a gap in the safeguarding file.

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Practical next steps for coaches, PE teachers and welfare officers

1. Know which protocol you are following. The UK Grassroots GRAS protocol applies to school and community sport. The elite HIA does not.
2. Remove any player with suspected concussion immediately. They do not return the same day, regardless of how the assessment goes.
3. Start the clock from the date of the incident, not from when the player starts feeling better.
4. Document every stage, including attempts that fail.
5. Do not progress an under-18 to stage five before day 21, even if all stages have been completed and the player is symptom-free.
6. Get clinical sign-off for stage five, not a coach's sign-off or a parent's.
7. Coordinate with the school's return-to-learn process. Sport does not restart before learning is fully resumed.

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Photo: Bryn Holmes, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons.

Sources

1. Sport and Recreation Alliance. UK Concussion Guidelines for Grassroots Sport (November 2024 update). https://sportandrecreation.org.uk/files/uk-concussion-guidelines-for-grassroots-non-elite-sport---november-2024-update-061124084139.pdf
2. Patricios JS, et al. Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport. British Journal of Sports Medicine, 2023. https://bjsm.bmj.com/content/57/11/695
3. Giza CC, Hovda DA. The Neurometabolic Cascade of Concussion. Journal of Neurotrauma, 2001. https://www.liebertpub.com/doi/10.1089/neu.2009.1855
4. Department for Education. Keeping Children Safe in Education 2024. https://www.gov.uk/government/publications/keeping-children-safe-in-education--2

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Luca's platform manages each GRTP stage with structured documentation, clinical review triggers and a complete audit trail. See how the pathway works end to end at /how-it-works/.