Over the past couple of decades, there has been a reported increase in diagnosed concussions (1-2). Despite this, it is estimated that up to 50% of concussions go unreported by athletes.
Athletes may not report their symptoms – or may delay the reporting of their symptoms – for a wide variety of reasons: from not wanting to disappoint their teammates, to not believing their symptoms are “serious enough to warrant medical attention,” to potentially even being unaware that they have a concussion (3).
Given the knowledge of what happens in the brain when concussed and the brain’s window of vulnerability (i.e., the brain’s susceptibility to “amplified and exponential damage if repeated injuries are sustained shortly after the initial concussion”) that has been described in concussion research literature, it is reasonable to speculate that delaying the reporting of concussion and continuing to compete in the practice or game may exacerbate processes that are happening in the brain and be detrimental to recovery.
A study published in 2016 decided to explore if there are any impacts on athletes who delay their reporting of their concussion and, consequently, their removal from athletic activity. The study compared the recovery time of athletes who were immediately removed from an activity after a sustained concussion versus those who delayed reporting and were not immediately removed from activity.
The research team obtained data from the University of Florida Concussion Database. This database contains “concussion-related medical history, injury event details, and assessment data on student-athletes participating in the university’s varsity athletic programs.”
Ninety-seven athletes that sustained concussions between 2008-2015 were identified and analyzed. These athletes sustained concussions from various sports, including men’s football, basketball, swimming, and diving alongside women’s lacrosse, soccer, basketball, volleyball, track and field, gymnastics, swimming, and diving.
There were six main findings of this study:
*Normal recovery was defined as seven or fewer days, and prolonged recovery was defined as eight or more days.
Interestingly, the first finding above occurred even after controlling for other potential variables for prolonged recovery, including sex, concussion history, learning disability diagnosis, ADHD diagnosis, diagnosed psychological disorders, and acute symptom severity.
This means that none of these variables were predictors of days missed from sport. This is contrary to previous research that has described these factors as contributing to prolonged recovery (4-13).
The researchers of this study suggest that their finding does not negate these studies’ findings but that it is important to research further the relationship between these other factors and timing of removal from activity in regards to prolonged recovery.
While this study was not perfect – for instance, male athletes and football players were overrepresented, and it was a retrospective study that relied on medical records that, in some cases, were incomplete – this study is the first to provide evidence that remaining in play after a concussion carries significant consequences in terms of prolonging recovery time.
These findings are consistent with other research that describes the brain’s window of vulnerability after a concussion and thereby seems to suggest that athletes who continue to play in sport once concussed are exposing their already injured brain to stress further whether by physical exertion, repeated brain impacts, or both (14-16).
These findings build upon preclinical studies that found that exercising too soon after concussion can lead to detrimental outcomes (17-19).
More importantly, these findings support the claim that it is important to immediately report signs and symptoms of concussion rather than play through the injury.
Given the low percentage of athletes that do not immediately report symptoms of concussion and the apparent need to educate athletes about prompt reporting, hopefully, these findings – if taught to athletes – will provide the athletes with the incentive to disclose suspected concussion immediately and protect them from unnecessary risks.
Indeed, it should be emphasized by the persons educating athletes about concussion that immediate reporting and removal from play is the best practice for the health and safety of the athlete, but also is in the best interests of teammates and coaches because the athlete will miss the shortest amount of time possible. This means that athletes should receive education on the “symptoms worthy of immediate reporting” so that they can be evaluated promptly. Ultimately, there is a need for systematic concussion education to ensure athletes, coaches, teammates, and all support staff know the importance of immediate symptom reporting for concussion injuries to stop the ‘playing through it’ culture that is so prominent in sport.
Bibliography