Rehabilitation Stage Activity/Exercise
(1) No activity Complete rest (cognitive and physical)
(2) Light aerobic exercise Walking, cycling (stationary) or swimming at <70% maximum predicted heart rate
(3) Sport-specific exercise Skating drills in hockey, running drills in lacrosse or soccer (no head impact activities)
(4) Non-contact training/practice More complex training drills (passing drills etc.) Light resistance training
(5) Full contact training/practice Following medical clearance, participate in full training/practice activities
(6) Return to play Game play
*Modified version of the recommendations presented at the Fourth International Conference on Concussion in Sport [1]
Table 1: Gradual return to play protocol.