In this book, the first of its kind written by a scientific expert, Professor Matthew Walker explores twenty years of cutting-edge research to solve the mystery of why sleep matters. Looking at creatures from across the animal kingdom as well as major human studies, Why We Sleep delves into everything from what happens during REM sleep to how caffeine and alcohol affect sleep and why our sleep patterns change across a lifetime, transforming our appreciation of the extraordinary phenomenon that safeguards our existence.
What do I need to know about getting enough sleep?
Most of the time, you can tell if you got enough sleep last night or not. But where do we draw the line between being well-rested and lack of sleep on an ongoing basis? Unfortunately, many people wait until sleepless nights turn into sleep deprivation before they address the problem, which can lead to serious health issues.