Read a few articles about concussions in football. They could be from the place you were browsing, news articles you find through Google, a library reference database such as Britannica Academic, or even a Wikipedia article.
You want to get a bigger picture of the issues around the topic. A quick search in different places shows more specific issues and things related to concussions in football.
|Source||Search Results / Article||Topics|
|search on football concussions filtered to news||youth league, high school, and college football; new helmet technology; testing for concussions (see screenshot below)|
|Britannica Academic (library database)||search on concussions and football ⇒ "chronic traumatic encephalopathy (CTE)" article||other sports where CTE is an issue (e.g. ice hockey, baseball, boxing, soccer, wrestling)|
|Wikipedia||"Concussions in American football" article||concussion prevention, litigation against the NFL, efforts for improving recovery from concussions|
Based on the background research you've just done, narrow in on a more specific topic. Your project will be much more manageable if you focus on one piece of the larger topic. Here are some examples of narrower takes on the football concussions topic: