经外国专家研究表明发现以下规律：

Dietary Nutrition Characteristics of Exercisers in Chess and Card Events

Chess and spleen are mainly mental activities. The energy of brain cells depends entirely on blood sugar.

When blood sugar decreases, brain oxygen consumption decreases and working ability decreases, resulting in a series of uncomfortable symptoms. Therefore, chess and card items have special needs for sugar, which can be supplemented at any time when playing chess or cards. In addition, dietary protein and vitamin B1, C, E, A supply, increase the content of lecithin, calcium, phosphorus, iron. Dietary fat intake should be reduced in order to reduce the body's oxygen consumption and ensure the oxygen supply of brain tissue. Protein supplementation should be more than usual, dietary mix should be light and delicious to increase appetite, and eat more vegetables and fruits to increase the intake of minerals and vitamins.

翻译过来：

国际象棋、棋类项目锻炼者的膳食营养特点

象棋和脾脏主要是精神活动。脑细胞的能量完全依赖于血糖。

当血糖降低时，大脑耗氧量降低，工作能力下降，导致一系列不舒服的症状。因此，象棋和纸牌物品对糖有特殊的需求，可以在下棋或打牌时随时补充。此外，膳食中蛋白质和维生素B1、C、E、A的供应，增加了卵磷脂、钙、磷、铁的含量。应减少膳食脂肪的摄入，以减少机体的耗氧量，保证脑组织的供氧。应多补充蛋白质，饮食搭配应清淡可口，以增加食欲，多吃蔬菜和水果，增加矿物质和维生素的摄入量。