This New York Times bestseller explains how groundbreaking scientific discoveries can help each of us achieve our personal best. Gretchen Reynolds consults experts in a range of fields to share paradigm-shifting findings that were previously academic and medical journals, including: 20 minutes of cardio is all you need – and sometimes six minutes is enough!

Whether you’re running ultra-marathons or just want to climb the stairs without losing your breath, this book will show you how to be healthy today and perform better tomorrow.