In the view of Baron Pierre de Coubertin, sport and physical exercise were essential components to the full life—and the fully developed human being.  He rejected any and all arguments that sport was only to be engaged in if one had the luxury of time.  Aside from the social class implications behind this idea, Coubertin argued against the notion that sport primarily served as an offset to intellectual activity.  I had not come across the word ‘brainwork’ until I read it in this passage, which is drawn from the last chapter of his Olympic Memoirs.  Rather than update the word, I left it, believing the anachronism enhanced the quote.