I am a walker, always walking alone, usually taking one of two or three possible routes depending on how I feel, weather conditions, and how much time I have for a walk. Sometimes I take photographs on my walk, my solitary walk; it’s all I do for exercise, but it’s also time for thinking. I am told that to be healthy one needs to lift weights, go to the gym, do yoga, tai chi, do jig saw puzzles to prevent dementia, don’t eat salt, avoid sugar, don’t smoke, don’t drink, eat a Mediterranean diet, and more, and I’d like to do these things, but all I do is walk.