"From beloved performance expert, journalist, and co-author of Peak Performance and The Passion Paradox comes a science-based new definition of toughness-one that focuses on assessing...

"From beloved performance expert, journalist, and co-author of Peak Performance and The Passion Paradox comes a science-based new definition of toughness-one that focuses on assessing a challenge on a physiological and psychological level rather than fear-based bulldozing-that has radical, holistic implications for any reader"--