Concept
The 40% Rule
3 books in the library reach for this idea - each in its own way. When independent authors converge on one concept, it usually deserves attention.
Can't Hurt Me
How this book uses it: When you think you're maxed out, you've only used 40% of your capacity. Your brain quits before your body needs to.
Living with a SEAL
How this book uses it: Your brain quits at 40% of actual capacity. When you think you're done, you're barely started. Test this during next workout - go past "failure."
Relentless
How this book uses it: Brain quits at 40% of actual physical capacity. When you think you're done, you're only at 40%. Today: push past your first "I'm done" moment.
