From beloved performance expert and bestselling coauthor of Peak Performance comes a revolutionary science-based new definition of toughness-one that focuses on assessing a challenge on a physiological and psychological level. Steve Magness, a performance scientist who coaches Olympic athletes, now offers a new kind of toughness-real toughness-that can help anyone navigate adversity and challenge. Grounded in the latest sports science and psychology, real toughness is about paying attention to your physiological, emotional, and psychological responses (from pain to anger) and working with them to overcome a challenge. Real toughness works with our biology and psychology; fake toughness fights against them. Do Hard Things flips the script on what it means to be tough, pointing to new research that shows how our understanding of resilience-one that ignores discomfort-is wrong. Magness draws from mindfulness, military case studies, sports psychology, neuroscience, psychology, and philosophy to show how real toughness makes us more successful, happier, and better people.