t 56, I am running my first marathon, an old, fat, bald dad surrounded by millennials in body hugging Lycra and smiles that look AI generated. But I am ahead of them. For they are only competing for positions and personal bests, and I am being chased by zombies. The black dog of depression hit me around the time of my last birthday. I didnt feel I had achieved anything of note for an eternity. I used to work out but, for years, work kept getting in the way. I decided to kill two circling,...