It is part of why people argue that Chess is a sport. When grandmasters battle it out for hours in classic chess, thinking ahead of so many branches of moves t

It is part of why people argue that Chess is a sport. When grandmasters battle it out for hours in classic chess, thinking ahead of so many branches of moves that I would find unfathomable, they do burn through a lot of energy. For what is quite a sedentary career choice, I rarely see overweight grandmasters. Though that is probably more correlation of other facts than causation...