Brain Food: An Inside Look at How Elite Grandmasters Eat.

Sitting for long hours at the chess board can be taxing, both mentally and physically. In order to maximize their performance at tournaments that can often be weeks long, many players focus on their health and nutrition just as much as their opening prep. Chess players burn tons of calories at high level

Elite chess players live longer than the general population and have a similar survival advantage to elite competitors in physical sports - Study : r/chess

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TIL even though the human brain only weighs 2% of an average persons body weight, it burns 20% of the calories you consume. : r/todayilearned

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Chess and Nutrition – how to feed a chess grandmaster