Exercise for Your Brain, Not Your Body

John Ratey's core thesis is counterintuitive: exercise's primary return isn't a leaner body but a sharper brain. Kirk Erickson's 2011 study proved it when 120 older adults who walked briskly three times weekly grew their hippocampus by two percent, reversing age-related shrinkage. The mechanism is BDNF, what Ratey calls "fertiliser for the brain." Stanford's Oppezzo and Schwartz found walking boosts creative output by sixty percent, whether outdoors or on a treadmill facing a blank wall.

You'll learn:

- Why the hippocampus grows from walking, not gym memberships

- How ten minutes of movement outperforms coffee before hard mental work

- The Erickson protocol that reverses cognitive aging