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Publisher's Summary

Learn the best time to do everything - from drink your coffee to have sex or go for a run - according to your body's chronotype.

Most advice centers on what to do or how to do it and ignores the when of success. But exciting new research proves there is a right time to do just about everything, based on our biology and hormones.

As Dr. Michael Breus proves in The Power of When, working with your body's inner clock for maximum health, happiness, and productivity is easy, exciting, and fun. The Power of When presents a groundbreaking new program for getting back in sync with your natural rhythm by making minor changes to your daily routine. After you've taken Dr. Breus' comprehensive Bio-Time Quiz to figure out your chronotype (are you a Bear, Lion, Dolphin, or Wolf?), you'll find out the best time to do over 50 different activities. Featuring a foreword by Mehmet C. Oz, MD, and packed with fascinating facts, fun personality quizzes, and easy-to-follow guidelines, The Power of When is the ultimate life hack to help you achieve your goals.

PLEASE NOTE: When you purchase this title, the accompanying reference material will be available in your Library section along with the audio.

©2016 Michael Breus (P)2016 Hachette Audio

Critic Reviews

"Dr. Breus has succeeded in making the complex science of chronobiology accessible and engaging for all readers. Whether you're looking to improve your relationships, get a raise at work, or simply lead a more fulfilling life, The Power of When is the guidebook you've been waiting for." (Mark Hyman, MD, director, Cleveland Clinic Center for Functional Medicine)
" The Power of When prepares you to take full advantage of our adaptation to the rhythms of nature. After reading this book, your decision-making ability will forever be improved. This is a new horizon in our understanding of human behavior, and Michael Breus masterfully presents the science as a recipe for self-improvement." (David Perlmutter, MD, author of Grain Brain and Brain Maker)

What members say

Average Customer Ratings

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  • Overall
    4 out of 5 stars
  • Performance
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    3 out of 5 stars

Very Interesting, Poorly Organized

What did you love best about The Power of When?

This concept is very interesting and enabled me to take natural rhythms into account when organizing my personal schedule, from morning to evening. It also helped me to coordinate better with my husband and understand his optimal schedule.

What three words best describe Michael Breus’s voice?

Pleasant, lively, enjoyable

What’s an idea from the book that you will remember?

There are several types of "people" when it comes to sleep. I find myself understanding others better by figuring out which type they are and considering their actions in light of that.

Any additional comments?

Although I enjoyed the book, I found myself to be a bit of an outlier. I took the quiz five times and each time I was deemed a dolphin. However, my husband and I both thought I was a lion. But I trusted the expert in this case and followed the dolphin schedule for two weeks, very stringently. Unfortunately, it was a complete failure for me. Just about every aspect of the schedule conflicted with what my body was telling me and I did not adjust to it. So I re-read the sections on the lion type and decided to try that instead. The lion schedule feels so natural to me and makes me feel happy, healthy, and rested. So, despite what the quiz told me, I am now 100% sure that I am a lion and my husband agrees.
For those readers who did not find this beneficial or accurate to their natural rhythms, I would encourage you to try the other schedules in this book before giving up on it. If one of them works well for you, then the added effort will be worth it.
Another criticism I have regards the organization of the book. It is very choppy, difficult to navigate, and not intuitive in format. It almost seems like the first draft before being professionally edited. I wonder if it was put together hastily and published without sufficient editing time? I do appreciate the content, and I hope that future editions will be better formatted.

13 of 14 people found this review helpful

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This is a wonderful audiobook. I have been dealing with insomnia for 58 years.Now I actually feel sleepy at night.Brain fog gone

This is a wonderful book.i now get sleepy at night .No more brain fog.No more body aches.

6 of 6 people found this review helpful

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This book is nothing short of amazing!

Even though (as I was pleased to find), I was already implementing a lot of tips from the book, I got so many other useful lifestyle tips (professional, personal and miscellaneous) that I have decided to start implementing...and I can definitely see the positive effects after only a week.

Even when it comes to the ideas that weren't so new to me, I was fascinated by the explanations behind them. They were backed by scientific papers and references (all listed in the book, of course), but in a simple, nonchalant manner.

What I loved most about the book was it's thorough, systematic organization, which makes it easy to understand and, what's even more important, to skim through after reading. This is a book that I will definitely have to have on my bookshelf and that I will return to many many many times.

Dare I say it...this may be the most useful lifestyle/productivity book (at least on a general level) that exists out there at the moment.

2 of 2 people found this review helpful

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Life changer!

This book is actively changing my life I am telling everyone I know it is a must read!!!!!

2 of 2 people found this review helpful

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chronotypes are worth thinking about

I have implemented some changes and they do make a difference. Credible information. Worthwhile.

1 of 1 people found this review helpful

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  • SK
  • LOS ANGELES, CA, United States
  • 05-22-17

Review

It was an interesting read. I think some things were applicable, but then others weren't or didn't seem applicable to my life.

The chronorhythme were good to learn about, but I feel like it could even be taken a step further. I think there are people that are between maybe a lion and a bear, or bear and wolf.

1 of 1 people found this review helpful

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Now I understand...

What did you love best about The Power of When?

Great information and many "no wonder why" moments for me as I listened to the book. Also a great book to discuss over dinner with friends. I had them take the power of when quiz and we discussed their chrono-types.

What did you learn from The Power of When that you would use in your daily life?

I've changed my daily habits to better coincide wth my type (lion). For example, I don't drink caffeinated coffee until late morning/early afternoon, and trying to work out in afternoon. I also am working to get my kids on better sleep schedule so they stay on their right bio-rythym.

1 of 1 people found this review helpful

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Learned a lot

This was ver informtive. I started making a change to my schedule and feeling better already.

1 of 1 people found this review helpful

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awesome book

I love how the author actually presents his findings with not only his knowledge but with actually study results. I knew alot of the things in this book but I never pin pointed stuff because I thought it was just me. it was really cool to hear/read the science in this book. I loved this book and bought 4 copies of it to give to family and friends.

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Such a great book!

This book was so interesting and informative! I really enjoyed how so many different ideas could be applied to my life and to my relationships with others. I would highly recommend this book!!