Change in research proposal

I have decided to make a change in the topic of my proposal. I will now research and write on the long term effects of concussions and athletes who experience them. My thesis isn't fully developed with this topic yet, but i know for certain that there are an abundant amount of sources available to take from because of the very popular discussion among health professionals regarding this topic right now. This is something that hits a little more home for me because I myself have experienced two concussions in my college football career within an 8 month span. I believe my motivation to complete this study is much higher than the previous topic that I picked.