productive day concept

a day has 16 hrs of waking hours. at the end of the 16th hours sleep will start coming. I have noticed this for the past 2 years. you cannot fight it. when I was younger, I could stretch this 16hrs to 18 maybe even 24 but that was when I was working in shift systems. Then I have noticed that the body needs 4 meals in those 16hrs evenly spaced. at first I thought the body needed high quantity of…