Earlier quoted context omitted.
So right now I'm 63 hours into a fast, which I just decided to do on a lark. I've been intrigued ever since hearing an interesting podcast on fasting ( https://tim.blog/2017/05/04/smart-drugs-fasting-and-fat-loss... ). At this stage, I have started to find mental things a little harder to do, but honestly its still pretty subtle and is pretty indistinguishable from the normal kinds of self pity I normally have when I…
> Physical tasks are obviously a different story. But your mind doesn't seem to slow down much at all for a pretty long time during fasting. I’m not sure i agree with this. Highly productive sessions always end with me feeling exhausted despite just concentrating intently for several hours. Doesn’t your brain already consume like 30% of your energy? It would really surprise me if your brain operated at full capacity…
While it's definitely true that some things slow down to conserve energy, it seems like the brain isn't one of em. There are moments* now I feel I'm thinking considerably clearer than usual. The world just feels unbelievably quiet. And things are getting done.
*I don't want to sell it as if it's all sunshine and rainbows. So far, getting to sleep has been hell, and the hunger pangs at times have been pretty insistent. While the hunger seems to have gone now, I have a general feeling of physical frailty, including lightheadedness when I stand up, and occasional light nausea.