I think a wrong concept is being circulated around. Will power is not energy, and there isn't a 'bank' you are depleting. And there isn't a 'spending' will power. If you are hungry, just go eat something and get back to work. Working while running short on energy is one of the things where will power helps, and not the only thing.
There are plenty of people who are very healthy and fit, but can't push for a minute extra beyond their threshold of tolerance.
If you look at it that way, Will power almost has mystical effect surrounding your ability to do certain things when they seem impossible to people outside. Which is why not every one eating and living healthy is swimming the English channel, or writing the next operating system, or playing the football world cup finals, or some one in dire poverty rising their way by hard work.
These things can't be gained eating something or living a particular lifestyle.
There are plenty of people who are very healthy and fit, but can't push for a minute extra beyond their threshold of tolerance.
If you look at it that way, Will power almost has mystical effect surrounding your ability to do certain things when they seem impossible to people outside. Which is why not every one eating and living healthy is swimming the English channel, or writing the next operating system, or playing the football world cup finals, or some one in dire poverty rising their way by hard work.
These things can't be gained eating something or living a particular lifestyle.