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Anyone who has made even casual observations about physical activity, endurance, and general work capacity in various parts of the world realizes that modern Americans from youth to old age are often in a nice jelly-like state of physical fitness compared to those in other parts of the world. Work is not pleasant for those whose forebears depended on work. Physical activity of any kind has become repugnant to so many young people that they are unable to walk a few blocks to sit at work. Their indulgence in sports with a few anthropoid exceptions is that of the spectator at gladiatorial contests. When they become obese and flatulent their tendency to react poorly when disease hits is well recognized. I doubt very much if this book on how to keep fit will have any effect at all on our culture where it is needed most, but if anyone is
Bean WB. How to Keep Fit and Like It.. AMA Arch Intern Med. 1958;101(4):841-842. doi:10.1001/archinte.1958.00260160165028