If you've ever run a marathon, survived a natural disaster, or given birth, you know that your body is capable of much more than you think. One U.S. Navy SEAL has formalized this idea into something many call the 40 percent rule. That is, when your mind says you're done, you're only 40 percent done.
Mind Over Matter
What The Science Says
Watch And Learn: Our Favorite Videos About Mental Toughness
Navy SEALs Have a '40 Percent Rule' And It's the Key to Overcoming Mental Barriers
Hear about the rule from Itzler himself.
Jesse Itzler and David Goggins
Hear an interview with the two men on CBS This Morning.
What Quality Do The Most Successful People Share?
Introducing the quality of grit.
Written By Ashley Hamer February 6, 2017
Wake up with the smartest email in your inbox.
Our best articles a few times a week.