Why do we need seven to eight hours of sleep? What is a good power nap? How do we maintain adequate sleep hygiene?
In ‘Why We Sleep’ by neuroscientist Matthew Walker, these questions are answered based on extensive research. Sleep is a necessity for our brain to enhance a wide variety of functions such as memory consolidation, emotional regulation, and even physical recovery. Our REM sleep is like overnight therapy and fuels creativity. Perhaps the reason why sleep is often easily neglected, contrary to diet and exercise, is because sleep enhances our health in ways we usually cannot easily see or grasp. As such, sleep deprivation can subtly lead to a range of health issues including cognitive decline, chronic diseases, and shortened lifespan. Chronic insomnia not only affects us individually; societal consequences are also mentioned by the author.
"We are … socially, organizationally, economically, physically, behaviorally, nutritionally, linguistically, cognitively, and emotionally dependent upon sleep."
Although the practical tips provided for improving sleep quality are common-sense – i.e. replacing LED bulbs, limiting caffeine and alcohol – they form an important reminder to actually realize them. If it is difficult to practice all tips, Walker suggests we at least maintain a consistent sleeping schedule, including weekends.
Why surgeons should read it:
“Sleep is for the weak” has long been a maxim that is now clearly inapt. Sleep deprivation, which is common in the demanding field of surgery, can significantly impair motor skills, reaction times, and memory, leading to potential mistakes in high-stakes environments such as the operating room. Consistent sleep deprivation can even accelerate cognitive decline.
‘Why We Sleep’ provides surgeons with actionable knowledge to not only improve their own performance but also to enhance patient outcomes and surgical training. The practical advice on sleep hygiene, managing circadian rhythms, and using strategic napping can help surgeons better cope with unpredictable work hours. By understanding how specific sleep phases solidify new information and procedural knowledge, surgeons can structure their study or manage schedules to improve retention. Surgeons can further integrate sleep hygiene advice into clinical practice and patient education, emphasizing its importance for better surgical outcomes.
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