The number of concussions experienced nationally has increased by nearly 100 percent in the past decade, according to the American College of Sports Medicine.
There are now more than 5,000 reported concussions in the United States each year, according the American Association of Neurological Surgeons.
Some experts have attributed the increase in concussions to a combination of better diagnosis and better treatment and to a greater awareness of the risks of head injuries.
But some of the concerns are not new.
The American College’s Concussion Advisory Committee, which advises the National Football League, has been studying the issue for years.
The committee has called for more education on concussions and more research into the link between head trauma and brain injuries.
Its research has been published in a growing number of journals, including The Lancet, the journal of The Lancet Foundation, the Journal of the American Medical Association, the American Journal of Sports medicine, The Journal of Clinical Neurosurgery, and the American journal of sports medicine.
The latest issue of the journal Pediatrics contains a report from the committee, which said it was concerned that the number of new concussions reported in the last two years may not be comparable with the peak years in the late 1990s.
The number was up from 6,923 in 2012, when the U.S. population was growing, and 7,935 in 2013, when there was a nationwide increase in head injuries, according it.
Concussions are a potentially dangerous condition that can lead to long-term disability.
According to the Centers for Disease Control and Prevention, about 40 percent of players who have sustained a concussion are never diagnosed and 15 percent of those are never able to resume play.
Some researchers, however, say that’s not the case.
A study of more than 7,000 former players and a survey of more 10,000 parents in the U., Canada, and Australia found that more than 95 percent of them had never been diagnosed with a concussion, and only about 12 percent were diagnosed with traumatic brain injury.
More than one-third of the parents in these countries did not report a concussion to their physician in the three years before the survey, according researchers.
This is a problem because if you don’t have a good understanding of your brain and its function, the diagnosis of a concussion is often difficult, if not impossible, to make, said Dr. Jeffrey W. Zavala, the chief of neurosurgery at Stanford University’s Stanford University Medical Center.
“What we are trying to do is provide a very, very high level of care for our athletes that they can live with,” Zavalla said.
The National Football Association has been working to increase the awareness of concussive symptoms, such as headaches and dizziness, and has begun offering a new game called “Kick Kick” that helps athletes better understand how to use their feet to get off the turf and tackle in the air.
The NFL also has made some changes in its concussion protocol, which is being reviewed by the league.
The league said the changes will include the use of “recovery zones” that would be placed around games to give athletes extra time to rest, rest and re-hydrate after a concussion.
The changes could also include the formation of a “game day” for players who are unable to return to play.
The Associated Press contributed to this report.