I was a runner... it became increasingly difficult as I neared the time to my surgery, which was emergency and acute. My brain was not connected to my body before the cyst was removed. I ran, but muscles were non-responsive, ie they did not firm up. I was increasingly lying down when I got home, needing 'brain breaks'. Since the cyst was removed, I became hyper, running a LOT, long walks, trying to calm an 'over-active' brain. I am not sure if this is in contrast to pre-cyst removal or a result of removal.