Since then, mounting evidence has indicated that sports-related concussions are not benign and require appropriate treatment. The question has been what these appropriate treatments should be.
In the early 2000s, dozens of the world’s premier experts on sports-related concussions started meeting to review studies about concussions, with plans to issue a consensus set of guidelines on how best to identify and deal with the condition.
The panel, called the Concussion in Sport Group, does not make formal clinical practice guidelines. But the group’s findings do represent the latest thinking about sports concussions by the world’s experts, based on the newest published science, says Dr. Leddy, who is also medical director of the Buffalo Concussion Management Clinic.
In its 2012 guidelines the Concussion in Sport Group recommended broadly that if an athlete of any age was found to have a sports-related concussion, he or she should rest as completely as possible, remaining in a darkened room with little visual or physical stimuli, until all symptoms had gone away and did not return once the athlete began easing back into normal activities, which could be a week or more.
This approach was thought to “promote recovery by minimizing brain energy demands following concussion,” the authors write in the new statement.
But since then, a number of studies in animals and people with diagnosed concussions have indicated that prolonged physical rest may actually delay the brain’s recovery.
So this month, the group published a new set of 2017 that significantly revise the recommendation for physical rest. Now the advice is that after a concussion an the athlete should remain quiet for 24 to 48 hours, but then should begin to get up and move.
Being physically active in this context “does not mean returning to the soccer field or football practice,” Dr. Leddy stresses. “This is about meeting certain low thresholds,” starting with a gentle walk around the block.
In his medical practice, he says, he has athletes time themselves as they return to exercise in the day or so after their injury. “We will ask them to walk until they begin to feel any return of symptoms” of the trauma, such as pain or dizziness, and note how long they have been moving. “If they went 15 minutes and then felt a headache, we’ll suggest they walk 10 or 12 minutes the next day and see if that feels O.K.,” Dr. Leddy says. If so, they can try again for 15 minutes the following day.
“Some symptoms,” such as a slight headache during the walk, “are not a problem,” he says. They may in fact indicate that the brain is healing.
The idea, he says, is to find each affected athlete’s “sweet spot,” of enough activity to stimulate brain recovery without exacerbating symptoms.