The 40% rule
The idea that when your mind says you are done, you are at about 40 percent
A rule of thumb from David Goggins: when your brain says quit, you have used roughly 40 percent of what you have. Nobody measured it, and his site presents it as a lesson rather than a figure. The point is to treat the first quit signal in a workout, a race or a study session as information rather than a verdict, then go and see how much is left. Most people pair it with something concrete, one more mile or ten more minutes, so it does not turn into an open-ended grind.
Who backs it
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- David GogginsRecommends
Retired Navy SEAL · Can't Hurt Me
His book page frames Can't Hurt Me around the claim that most people tap into about 40 percent of their capability; he calls it the 40% Rule.
Source: davidgoggins.com: Books
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