An interesting article on ESPN about eating/physical training regimens of top chess players in preparation for tournaments. Wonder if the top Go players are doing the same.

https://www.espn.com/espn/story/_/id/27 ... ying-chess

In Japan pros talk about the importance of tairyoku (bodily strength, stamina, etc.). It is recognized that physical fitness can be important. It is also known that sustained mental concentration burns calories significantly, but whether go pros train the way Caruana does, I don't know.