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The game-day chess nutrition guide

You can actually sweat during a game. Your head can heat up. If you weight your self before and after, you might know a bit more of how much you lost in an hour. Compare it to your sleep. That way you are using numbers that only affect you.
www.sleepfoundation.org/how-sleep-works/how-your-body-uses-calories-while-you-sleep

Our attention span may vary from one person to another. Taking a pause for a minute, every 15 minutes of intense thought might be beneficial. Even the eyes behave differently staring at the chessboard. It's all in the aim of remaining focused during the game. Eating well is good. Eating or drinking too much might make you lose time during the game. You should plan your breaks. So get up when you reach that 30 or 40 move time control. That's the move that gives you extra time to stretch and grab some fresh air for 3 minutes. Nutrition is important, but it's like a car, some are gas guzzlers. So some may need more or less energy, depending on a lot of factors. Listen to your body and find you comfort zone.

If you remove the distractions and discomforts, the best move is going to be the next move you focus on.
The stuff about burning 6000 calories playing chess was obvious nonsense. When I was training for a marathon on training days where I went on a 20 mile run I burned about half of that.
I am surprised avoid sugar isn't mentioned.

I like drinking but limit myself to 1 night per week.
Seems like thinking is affected by glucose levels, so you obviously don't what Brain Fog (lack of focus or mental fatigue) while you are playing chess. You want to remain clear-headed (stress-free) while you play chess.

youtu.be/TXw4qedzHjk
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@zweb said in #4:
> I am surprised avoid sugar isn't mentioned.

I guess sugar goes in the 'carbohydrates' category. It is not evil per se but eating too much processed sugar (read sweets, donuts) will have adverse effects as they are very calorie dense.

@Toscani said in #5:
> Seems like thinking is affected by glucose levels, so you obviously don't what Brain Fog (lack of focus or mental fatigue) while you are playing chess. You want to remain clear-headed (stress-free) while you play chess.

Yes! have a snack of carbohydrates. Find one that works well for you. I will suggest a banana.
"trans and unsaturated fatty acids are worse for cognition than saturated ones."

Sure would be nice if my opponents follow this advice to avoid unsaturated fats & focus on eating saturated fats.

Trans and saturated is what you want to avoid.