William Person, a former Team USA bobsledder, opens up about the years he lost to brain fog, panic, migraines, and crushing depression—only to trace it back to the relentless G-forces and micro-impacts to the brain that are baked into his sport. We follow William’s turning point as he connects his symptoms to the same patterns seen in veterans exposed to blasts, survivors of domestic violence, and crash victims. The label many of them eventually wear—CTE—can only be confirmed after death, whi...