Sledding athletes are taking their lives. Did brain-rattling rides and high-speed crashes damage their brains?

In recent years, an increasing number of athletes, current and retired, in sliding sports, especially bobsled and skeleton — a sister sport in which competitors slide headfirst on a small sled made of metal and carbon fiber — have said they battle chronic headaches, a heightened sensitivity to bright lights and loud noises, forgetfulness and psychological problems.

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