This book is a real turning point that explains something I've been trying to figure out for years. Exercise is not simply necessary, as Dr. Ratey clearly shows, it's medicine.

Greg LeMond, three-time winner of the Tour de France

At last a book that explains to me why I feel so much better if I run in the morning!

Dr. Susan M. Love, author of Dr. Susan Love's Menopause and Hormone Book and Dr. Susan Love's Breast Book

About the Author

John Ratey, M.D. is a clinical professor of psychiatry at Harvard Medical School. He is the author of numerous bestselling and groundbreaking books, including Driven to Distraction, Go Wild, and A User's Guide to the Brain. He lives in Cambridge, Massachusetts, where he has a private practice. Eric Hagerman is a former editor of Popular Science and Outside. His work has been featured in The Best American Sports Writing 2004, Men's Journal, and PLAY.


Spark is just what we need—a thoughtful, interesting, scientific treatise on the powerful and positive impact of exercise on the brain. In mental health, exercise is a growth stock and Ratey is our best broker.

Medical Director for the National Alliance on Mental Illness

Ratey has culled the latest science and found that a regular workout can help build a better, faster brain.

USA Today

This is my self-help book for the season.

Houston Chronicle


Walter Dixon


9 hours 30 minutes


Gildan Audio

Publication Date


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