Matthew Walker, Ph.D earned his degree in neuroscience from Nottingham University, and his Ph.D in neurophysiology from the Medical Research Council. Currently, he is Professor of Neuroscience and Psychology at the University of California. He has published over 100 scientific research studies on the impact of sleep on human brain function.

Đây là quyển sách đầu tay của Giáo sư TS. Matthew Walker, được xem là một trong những chuyên gia hàng đầu về nghiên cứu giấc ngủ. Trong quyển sách này, ông trình bày những khám phá mới nhất về giấc ngủ, một trong những điều bí ẩn vẫn chưa có lời giải đáp.

Giấc ngủ là một hoạt động quan trọng của con người. Thế nhưng câu hỏi tại sao chúng ta cần phải ngủ, ngủ để làm gì, và tại sao giấc ngủ có ảnh hưởng nhiều đến chất lượng cuộc sống vẫn chưa có lời giải đáp cho đến thời gian gần đây.

Hàng loạt những khám phá quan trọng trong 20 năm qua về giấc ngủ đã góp phần trả lời các câu hỏi quan trọng bên trên.

Giấc ngủ đóng vai trò mấu chốt trong quá trình học tập, ghi nhớ, nâng cao năng suất. Nó giúp chúng ta điều hoà cảm xúc, tăng cường hệ miễn dịch, điều chỉnh quá trình trao đổi chất của cơ thể, làm chậm quá trình lão hoá. Các giấc mơ giúp giảm nhẹ các ký ức đau khổtăng cường khả năng sáng tạo nhờ vào sự kết hợp các kiến thức mới và cũ.

Sleeping with Science
12 Tips for Healthy Sleep
  1. Stick to a sleep schedule. Go to bed and wake up at the same time each day. As creatures of habit, people have a hard time adjusting to changes in sleep patterns. Sleeping later on weekends won’t fully make up for a lack of sleep during the week and will make it harder to wake up early on Monday morning. Set an alarm for bedtime. Often we set an alarm for when it’s time to wake up but fail to do so for when it’s time to go to sleep. If there is only one piece of advice you remember and take from these twelve tips, this should be it.
  2. Exercise is great, but not too late in the day. Try to exercise at least 30 minutes on most days but not later than 2 to 3 hours before your bedtime.
  3. Avoid caffeine and nicotine. Coffee, colas, certain teas, and chocolate contain the stimulant caffeine, and its effects can take as long as eight hours to wear off fully. Therefore, a cup of coffee in the late afternoon can make it hard for you to fall asleep at night. Nicotine is also a stimulant, often causing smokers to sleep only very lightly. In addition, smokers often wake up too early in the morning because of nicotine withdrawal.
  4. Avoid alcoholic drinks before bed. Having a nightcap or alcoholic beverage before sleep may help you relax, but heavy use robs you of REM sleep, keeping you in the lighter stages of sleep. Heavy alcohol ingestion also may contribute to impairment in breathing at night. You also tend to wake up in the middle of the night when the effects of the alcohol have worn off.
  5. Avoid large meals and beverages late at night. A light snack is okay, but a large meal can cause indigestion, which interferes with sleep. Drinking too many fluids at night can cause frequent awakenings to urinate.
  6. If possible, avoid medicines that delay or disrupt your sleep. Some commonly prescribed heart, blood pressure, or asthma medications, as well as some over-the-counter and herbal remedies for coughs, colds, or allergies, can disrupt sleep patterns. If you have trouble sleeping, talk to your health care provider or pharmacist to see whether any drugs you’re taking might be contributing to your insomnia and ask whether they can be taken at other times during the day or early in the evening.
  7. Don’t take naps after 3 p.m. Naps can help make up for lost sleep, but late afternoon naps can make it harder to fall asleep at night.
  8. Relax before bed. Don’t overschedule your day so that no time is left for unwinding. A relaxing activity, such as reading or listening to music, should be part of your bedtime ritual.
  9. Take a hot bath before bed. The drop in body temperature after getting out of the bath may help you feel sleepy, and the bath can help you relax and slow down so you’re more ready to sleep.
  10. Dark bedroom, cool bedroom, gadget-free bedroom. Get rid of anything in your bedroom that might distract you from sleep, such as noises, bright lights, an uncomfortable bed, or warm temperatures. You sleep better if the temperature in the room is kept on the cool side. A TV, cell phone, or computer in the bedroom can be a distraction and deprive you of needed sleep. Having a comfortable mattress and pillow can help promote a good night’s sleep. Individuals who have insomnia often watch the clock. Turn the clock’s face out of view so you don’t worry about the time while trying to fall asleep.
  11. Have the right sunlight exposure. Daylight is key to regulating daily sleep patterns. Try to get outside in natural sunlight for at least thirty minutes each day. If possible, wake up with the sun or use very bright lights in the morning. Sleep experts recommend that, if you have problems falling asleep, you should get an hour of exposure to morning sunlight and turn down the lights before bedtime.
  12. Don’t lie in bed awake. If you find yourself still awake after staying in bed for more than twenty minutes or if you are starting to feel anxious or worried, get up and do some relaxing activity until you feel sleepy. The anxiety of not being able to sleep can make it harder to fall asleep.
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Gate’s Notes

Reading in the Brain
Brain Rules
The Molecule of More
How We Learn