loader image

At The

The Limits of Human Physiology and Performance

Explore the Limits of Human Physiology and Performance

Grab your copy now

What's the Book About?

“At The Human Edge” is a non-fiction popular science book which unravels the amazing adaptive physiological responses that our bodies undergo as we push ourselves to the physical limits in human performance. Each chapter is dedicated to a unique extreme environment, on Earth and beyond. It captures the history, geography, legacy and the physical challenges which our physiology faces when we have tried to conquer the great outdoors. From Mt. Everest to the South Pole, from a journey to Mars to the bottom of the Mariana trench, from running Marathons to surviving in the Sahara, this highly informative, gripping and accessible book lays out the complex world of cellular biology against the backdrop of human history.

“From James Cameron’s voyage to the depths of the Mariana Trench to Neil Armstrong’s first steps on the moon, Dr. Marcus Ranney paints an intriguing picture of how the human body responds and what it’s capable of under the most extreme conditions. Now more than ever, we need a new generation of young scientists who will continue to push back the boundaries of the unknown.”
Dr. Tedros Adhanom Ghebreyesus
Director-General, World Health Organization
“At The Human Edge, by Dr. Marcus Ranney, is not just a book for elite athletes looking to improve their performances, but a guide for all of us, to journey towards our “best self”. It inspires us to go beyond our perceived limitations and by doing so, to truly be alive and operate at our fullest potential.”
Jonty Rhodes
International Cricketer, Current Coach, Commentator, Traveller
“Work hard and live life to fulfill your own potential. In reading the words in this book, I hope future scientists, doctors, climbers and adventurers are inspired to push the boundaries of science further, to scale new heights of discovery and summit new peaks of achievement, creating a better world for the current and future generations. Falling in love with nature and the outdoors and this beautiful gift — the human body.”
Sir Chris Bonington
CVO, CBE, DL, British Explorer
“Congratulations, Marcus on this great book. After reading through the chapter on mankind’s potential journey to Mars, I now know, in gory detail, what would have really happened to me had my helmet popped off during one of my space walks on the International Space Station. Seems rather unpleasant! This book is a great read for anyone inspired to venture into deep space and understand the challenges that need to be overcome to put a human footprint on the Red Planet or those that are simply curious about the physiological effects of extreme environments.”
Captain Scott Kelly
NASA Astronaut, Commander ISS (Retd U.S. Navy)
“I’m humbled by the reception of my book, “At The Human Edge”, and all the support it’s received in India to date. To see readers take such an interest in human biology - a subject I’m so passionate about - is heartwarming and I will continue to influence and advocate on this important topic in the years to come. Let’s start small and start today, to move towards a journey of wellbeing, performance and longevity. Stay well.”

-Dr. Marcus Ranney

At The Human Edge is now a best-seller at the Amazon Kindle store across three categories- Sports Medicine, Anatomy and Physiology! The book is now available globally. Grab your copy now, at a bookstore near you or at amazon.com.

About the Author, Doc.M

Dr. Marcus Ranney’s journey has led him from disease care, at the patient’s bed-side, to wellbeing, in some of the most extreme environments around the planet. Graduating from University College of London Medical School (UCL), his research has taken him to Mt. Everest, the Arctic Circle and the Alps. He has worked with fighter pilots whilst in the Royal Airforce and with astronauts whilst at NASA. Leaving the world of clinical medicine in 2010, his work now looks at the role of wellbeing in society and how technology can be crafted as a force for good. A keynote speaker and global health commentator, he has been a World Economic Forum’s Global Shaper, and more recently, appointed as a Senior Fellow to the Atlantic Council. Marcus is a keen athlete and long-distance marathon runner, also holding a Guinness Record for backwards running, and he most of all describes himself as a young hands-on father intent on making this world a better place for his two children.