The 2nd International Conference on Concussion in Sport held in Prague in 2004 (Prague consensus statement) recommends a step by step approach to return to play after sports concussions, recommending that athletes:
Not be allowed to return to play in the current game or practice even if the symptoms quickly disappear (Note that this is more conservative approach than other return-to-play guidelines);
Be evaluated by a doctor;
Not be left alone (regular monitoring for signs of deteriorating mental status is essential over the first 24 to 48 hours following a suspected concussion).
Once an athlete is symptom-free he should not be allowed to return to play sports until he has completed the following medically supervised stepwise process:
No activity, complete rest (for youth athletes, complete rest includes cognitive rest, i.e. no school or doing homework). Once an athlete is completely symptom free, proceed to step 2;
Light aerobic exercise such as walking or stationary cycling, no resistance training;
Sport specific training (i.e. skating in hockey, running in soccer);
Non-contact training drills;
Full contact training, ideally only after clearance by a medical doctor;
Game play.
Some experts, including MomsTeam's concussion expert, Dr. Robert Cantu, feel the Prague return-to-play protocol should apply only where an athlete has suffered a "complex" concussion. Athletes who suffer "simple" concussions can be allowed to return to play within a week.