Ask HN: Do you feel tired/exhausted after long deep hours of coding?

I've been working as a programmer for over 20 years. I started my experience when the first computer arrived at my house; an x86 (286 actually) without protected memory meaning I had to code in text files and then open the IDE and compile there or command line compile within DOS. It sucked having to switch in and out of an IDE. But it taught me persistence and the ability to keep going to solve the problem. I would work late into the night before responsibilities forced me to go home to attend to first a girlfriend, then wife, then little ones. Life is about choices. You can only control your choices and nothing and no one else. What is your goal? Your desires? Your fears? If you honestly ask yourself these questions and struggle with the answer, when it comes to you it will be a wonderful moment in your life. If coding comes naturally and you enjoy it and you feed your brain sufficiently good quality food (ok a little junk food) you should be able to sustain multiple sessions of coding in one 16 hour period - but take breaks. You also should look at your sleep habits. With less than 8 hours personally I see and feel the slowdown. My brain is unable to process at full speed. You should limit coffee for when absolutely necessary. Over time your response will reduce and you will be an absolute zombie when off the coffee - not to mention the headaches, etc. So give it a try and see how your brain performs.

one addition: Coding is the expression of work done in your head. The expression of a solution you slept on and solved in your sleep. The current way to get information from your head and into the computer. If you are coding straight 3-5 hours, I'd ask can you automate something? Spend some time thinking about the problem you are trying to solve, draw something, then code it to get it out of your head.