I must admit that I have never been particularly physically fit. As a child I was very active in and thoroughly enjoyed sports, neighborhood games, and so on. But I was also overweight. Now, as a senior citizen, I remain reasonably active, and this includes 30 to 35 minutes on a treadmill four or five days a week.
I recent years I have read a lot of articles and an occasional book about what is being learned about exercise, physical health, and cognitive fitness. The following is a book that I have just started reading on my Kindle: