And as I mentioned before , your ability to think and perceive things is actually enhanced by having sufficient glucose in your bloodstream . So why would it be that some people experience a heightened state of mental clarity when they are fasted ? I've certainly experienced that before .
So they opt for intermittent fasting and so on and so forth . But one of the things that you hear very often is that some people like being fasted because they like the clarity of mind that it provides . Here's the situation , neurons , unless you're in a ketogenic diet , really thrive on glucose .
Imagine a U shaped function , right ? Where if you're very fasted , you're going to have a high degree of focus and concentration . But then if you ingest some food and your belly is full , your focus and concentration is reduced .
That's my first focus bout of 90 minutes or less . That is essentially done fasted and then I'll eat and then I do notice after I eat , I actually have a diminished capacity to focus . But then again , in the afternoon , I will do another 90 minute bout of focus and I'll talk about some of the tools I use to make sure that that bout of focus is optimal for getting the most amount of focused work done whether or not it's mental work or physical work .
But in general , unless I'm working out very early , I will ingest my caffeine 90 to 100 and 20 minutes after I wake up . So again , I want to emphasize that if you hear somebody out there say being fasted is optimal for focus and concentration . Well , that is true in one context and perhaps ideal for a certain part of the day .
