Should You Exercise After a Concussion? The 2-Point Rule, Explained
For years, people with concussions were told to rest until every symptom was gone. We now know that, after the first day or two, the right kind of exercise helps more than it hurts. The trick is the dose.
Why exercise, and why it can backfire
In a well-known trial, teenage athletes who started light aerobic exercise within the first 10 days after a sport concussion recovered faster on average than those who did stretching only. The 2023 international consensus on sport concussion recommends light aerobic activity early on, and prescribed aerobic exercise for people whose symptoms last more than a month. Evidence in adults with long-lasting symptoms is still growing and mixed, but carefully dosed exercise is generally safe once your doctor has cleared you, and it is the active treatment with the most support.
The catch: push too hard and symptoms flare. Many people try a hard workout, feel terrible, and conclude exercise “doesn’t work” for them. Usually the dose was the problem, not the exercise.
The 2-point rule
Guidelines in sport and in adult return-to-activity use a simple limit, often called the 2-point rule:
Rate your symptoms from 0 (none) to 10 (worst) before you start. During and after activity, it’s OK if they go up by 2 points or less, as long as they settle back within about an hour.
| You start at | Fine | Slow down or stop |
|---|---|---|
| 2 | 3 or 4 | 5 or higher |
| 3 | 4 or 5 | 6 or higher |
| 5 | 6 or 7 | 8 or higher |
If you go over: stop or slow down, rest, and check again in about an hour. If you’re back within 2 points, that’s normal. Repeat the same amount next time instead of adding more. If you’re still well above your starting number after an hour, or you wake up clearly worse the next day, take a break and check in with your doctor before you continue.
The talk test: how hard to go
You don’t need a heart-rate monitor. Aim for an effort where you’re breathing harder, but can still talk in full sentences. If you can only get out a few words at a time, ease off.
A simple way to start
- Pick something easy to control: walking, a stationary bike, or easy cycling on a flat route.
- Start with about 20 minutes, five days a week, at a talk-test effort.
- Add about 5 minutes a week, up to 30, if your sessions are staying within the 2-point rule.
- Hold, don’t quit, after a flare. Repeat the same amount until it goes well again.
- High-symptom days: if you start the day at 7 or higher out of 10, take a rest day or an easy 10-minute walk.
The same rule works for other activities too: screen time, a trip to the store, a work shift. Rate before, keep the rise to 2 points or less, and build up step by step.
Before you start
Check with your doctor first, especially if you have heart or lung problems, a recent injury, dizziness that makes falls likely, or if your concussion is less than a few days old. Avoid anything with a risk of another hit to the head until a doctor clears you.
Get help now. Call 911 or go to the emergency room for a headache that keeps getting worse, repeated vomiting, a seizure, weakness or numbness, slurred speech, growing confusion, double vision, or trouble staying awake. If you are having thoughts of hurting yourself, call or text 988.
Still struggling weeks after a concussion?
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References
- Leddy JJ, et al. Early subthreshold aerobic exercise for sport-related concussion: a randomized clinical trial. JAMA Pediatr. 2019;173(4):319–325.
- Patricios JS, et al. Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. Br J Sports Med. 2023;57:695–711.
- BC Guidelines. Concussion / Mild Traumatic Brain Injury (mTBI), Appendix A: Return to Sport Protocol. Updated December 2024.
This article is general education, not medical advice, and reading it does not create a doctor-patient relationship. Concussion recovery is individual: talk with your own doctor about your symptoms and before starting or changing exercise. Last reviewed October 10, 2026.