Concussion Graded Exertion Progression: Milestones and Symptom Checkpoints

Six days after the hit, the symptom checklist comes back clean — no headache, no fog, no light sensitivity — and the athletic trainer says it's time to start the return-to-sport stages. What almost nobody hands the athlete at that moment is a number: what heart rate is actually safe to hit during stage 2, how far the symptom score is allowed to climb before a session counts as a fail, or how long to sit at a stage before the next jump is safe. Symptom-free at rest and cleared for exertion are not the same state, and treating them as interchangeable is exactly how a clean-looking week 1 turns into a setback in week 2 — usually somewhere around the first sprint drill or the practice that runs ten minutes long.

The framework below replaces feel and see with a measured heart-rate ceiling pulled from a graded exertion test, a six-stage table with an actual load target attached to each step instead of just an activity label, and a rule for telling when a plateau means back off versus when it means get a vestibular screen instead of pushing harder.

The advice that dominated concussion management for years was straightforward and, it turns out, wrong in its details: rest completely until every symptom clears, then climb a fixed ladder of activity a single stage per day. Patricios, Schneider, Dvorak, and colleagues, writing the 2023 Amsterdam Consensus Statement on Concussion in Sport in the British Journal of Sports Medicine, moved the field away from that blanket-rest model — the updated guidance supports symptom-limited activity starting within 24 to 48 hours of injury, with structured aerobic exercise layered in once light activity is tolerated, rather than waiting for a symptom-free baseline first. As a consensus statement built from expert synthesis of the field rather than a single controlled trial, it doesn't carry its own effect size — its contribution here is the framework the rest of this guide follows, not a measured outcome in its own right.

The trial data behind that shift comes from Leddy, Haider, Ellis, and colleagues (2019), published in JAMA Pediatrics. In a randomized trial of just over 100 adolescents with sport-related concussion, participants assigned to individualized, supervised subsymptom-threshold aerobic exercise — starting between 4 and 10 days post-injury and dosed at roughly 80% of a heart-rate threshold determined by a graded exertion test — recovered noticeably faster and had roughly half the rate of delayed recovery (symptoms persisting beyond one month) compared with a stretching-only control group. The catch: every participant had that heart-rate threshold set individually by staff trained in the test protocol, and the population was adolescents managed through a single specialty clinic. It's evidence that controlled, threshold-guided exertion beats blanket rest — not evidence that any pace an athlete picks on their own, without a measured ceiling, produces the same result.

The test that produces the heart-rate ceiling used throughout this progression is commonly known as the Buffalo Concussion Treadmill Test, developed out of Leddy and Willer's work establishing graded exercise testing as a return-to-activity tool. It requires a motorized treadmill, a chest-strap heart-rate monitor rather than a wrist-based optical sensor — accuracy at the higher intensities near the stopping point matters here — a stopwatch, and a standardized symptom scale scored before the test begins and again at the end of every stage, typically the 22-item Post-Concussion Symptom Scale rated 0 to 6 per item and summed to a total.

• Baseline: record resting heart rate and the total symptom score before stepping on the belt.
• Start: begin walking at a comfortable, sustainable pace — commonly in the 3.2 to 4.0 mph range — at 0% grade.
• Progression: hold speed constant and increase incline by 1% every minute, following the Balke protocol, rather than increasing speed.
• Check every minute: log heart rate and total symptom score at the end of each one-minute stage.
• Stop criteria: the test ends at volitional exhaustion, at age-predicted maximum heart rate, or the moment the total symptom score climbs meaningfully above baseline — many clinics use a rise of roughly 3 or more points on the summed scale, or a clear reproduction of the athlete's primary concussion symptom — whichever arrives first.

An athlete whose recovery is essentially complete typically reaches at least 85 to 90% of age-predicted maximum heart rate without symptom exacerbation, often finishing the protocol at volitional exhaustion instead of a symptom stop. An athlete who isn't there yet usually hits the exacerbation point well below that — often somewhere in the 60 to 75% range — and that specific heart rate, not a percentage of max heart rate, becomes the number the rest of the progression is built around: home and clinic aerobic sessions get prescribed at roughly 80% of the exacerbation heart rate until a repeat test pushes the threshold higher.

The Amsterdam framework keeps the familiar six stages, each held a minimum of 24 hours, but the version below attaches an actual heart-rate or load number to each one instead of leaving the athlete to guess what light aerobic exercise or sport-specific exercise means in practice.

Every stage requires a minimum of 24 hours before the next jump, and a symptom recurrence at any point drops the athlete back to the last fully symptom-free stage for at least another 24 hours before re-attempting — not just a skipped day at the current stage. That regression rule is where most self-managed progressions quietly fail: an athlete who feels 90% right talks themselves into holding at the current stage rather than actually stepping back, and ends up stuck oscillating around the same failure point for two or three weeks instead of resolving it in three or four days.

Check these four signals after every session at stages 2 through 5, not only when something feels obviously wrong.

A single yellow signal means repeat the current stage before adding anything — don't average it against three green signals and call it a wash. Any red signal means drop back a full stage, not just hold flat, and stay there a minimum of 24 hours before the next attempt. This is the same lesson from the six-stage table above stated as a rule instead of a table row: the setback that feels disproportionate to a little morning fog is almost never actually disproportionate.

A club hockey player I worked with sat at stage 2 for three straight weeks. Heart rate at the exacerbation threshold wasn't climbing, more aerobic base work wasn't moving it, and the coaching staff had started quietly wondering whether the recovery timeline itself was the problem. It wasn't exertion that triggered his symptoms — it was quick head turns and tracking a moving object across his peripheral vision, which happened to show up constantly on a stationary bike facing a gym full of moving people, but barely at all on a treadmill facing a blank wall. More cardiovascular conditioning was never going to fix a vestibular and cervical pattern that had nothing to do with heart rate.

Schneider, Meeuwisse, Nettel-Aguirre, and colleagues (2014), publishing a randomized controlled trial in the British Journal of Sports Medicine, tested exactly this subgroup: young athletes with persistent post-concussion symptoms who received cervicovestibular rehabilitation added to usual care versus usual care alone. By 8 weeks post-injury, roughly 73% of the cervicovestibular rehabilitation group had been medically cleared to return to sport compared with roughly 7% of the usual-care-only group — a large gap, though the trial itself was small, with around 30 athletes split across both arms, so those exact percentages describe that sample rather than a guaranteed population rate. The finding that transfers regardless of the small sample is the mechanism: a meaningful subset of plateaued athletes have a vestibular or cervical driver rather than a purely cardiovascular one, and no amount of additional aerobic sessions addresses that.

The practical trigger for asking about a vestibular-oculomotor screen instead of just holding the stage longer: two consecutive sessions where the exacerbation heart rate hasn't moved, combined with symptoms that seem more tied to head movement or visual tracking than to how hard the athlete is breathing.