What is the return-to-sport protocol after a concussion?

Rugby Canada's Concussion Policy sets a graded return to sport:

1. Symptom-limited activity (daily activities that do not worsen symptoms). Rest is relative for the first 24-48 hours.
2. Light aerobic exercise (up to about 55% of max heart rate, then about 70%).
3. Sport-specific exercise away from the team, with no activities at risk of head impact.
4. Non-contact training drills.
5. Full contact practice, only after medical clearance.
6. Return to sport with normal participation.

Allow at least 24 hours per step. If symptoms return or worsen, go back to the previous step; if they persist, see a physician. Steps 4-6 begin only after symptoms and clinical findings have resolved, including with and after exertion, and are monitored by a healthcare professional. Written determination of readiness from a healthcare provider is needed before unrestricted return. Expect a minimum of about one week, with unrestricted return typically up to one month.