40 percent rule

When your mind tells you that you’re exhausted, fried, totally tapped out… you’re really only 40 percent done. You still have 60 percent left in your tank.

That’s the 40 Percent Rule, a concept popularized by Dave Goggins through Jesse Itzler’s book, Living With a Seal. The premise is simple: When your mind tells you that you’re exhausted, fried, totally tapped out… you’re really only 40 percent done. You still have 60 percent left in your tank.