人只要规律睡眠就没有身体不好的

book: why we sleep:

when you sleep , keep your temperature low. reserve yourself better.

睡觉时，保持低温。更好地保留自己。

The book is written from a neuroscientific view and is mainly devoted to discussing about the impact sleep has on the functions of the human brain. The book is divided into four parts, each section focusing on how sleep works, its benefits, the reason why dreams occur and sleep issues surrounding society.

这本书是从神经科学的角度写的，主要讨论睡眠对人脑功能的影响。这本书分为四个部分，每个部分都关注睡眠是如何工作的，它的好处，做梦的原因以及围绕社会的睡眠问题。

Please do not begin it just before bedtime.

请不要在睡前开始。

1.遵守规律的睡眠时间。每天同一时间上床，同一时间起床。人是会按照习惯行事的生物，一旦养成睡眠规律，就很难调整改变。周末睡得较晚，并不能完全补赏周间的睡眠缺乏，也会造成星期一早上更难早起。设定闹铃，提醒自己上床睡觉。我们常为起床时间设闹铃，却没有定时睡觉。如果十二项守则中你只能遵守一项，就是这一项了。

2.运动好处多多，但是不能太晚运动。尽量每天运动至少三十分钟，但要在睡前二至三小时前结束。

3.远离咖啡因和尼古丁。咖啡因是一种兴奋剂，在咖啡、可乐、某些茶饮和巧克力中都有，它的效果可能要八小时才会完全退去，因此旁晚的一杯咖啡会让你晚上难以入眠。尼古丁也是一种兴奋剂，常使吸烟的人睡的很浅。另外，解除尼古丁时，吸烟的人早上常会太早醒来。

4.避免睡前饮酒。睡前小酌或许让你放松，但喝太多会使你缺少快速动眼睡眠，让睡眠较浅。大量饮酒也可能造成夜间的呼吸困难。当酒精的作用在体内逐渐消掉后，也比较容易让你在半夜醒来。

5.避免太晚吃大餐、喝太多饮料。轻食没问题，但食物分量较多时会造成不消化，干扰睡眠。晚上喝太多饮料会导致夜里必须常醒来上厕所。

6.可能的话，不要服用会延后或干扰睡眠的药物。有些心脏、血压或气喘方面常用的处方药，以及咳痰、感冒或过敏的非处方药和草药，有可能干扰睡眠模式。如果你有睡眠方面的困扰，可以告诉你的医师或药师，确认你正在服用的药物是否和睡不好有关，也可以询问你的药是否在白天或晚上较早时服用。

7.不要在下午三点之后睡午觉。午睡可以补充睡眠不足，但太晚睡午觉的话，可能会让晚上更难入睡。

8.睡前要放松。不要把事情安排得太慢，让你的睡觉前没有机会放松。可以安排一些轻松的活动，例如阅读或听音乐，作为睡觉前的习惯。

9.睡前泡个热水澡。泡完澡后体温会降低，可以帮助你觉得想睡，泡澡也会帮助你身心舒缓放松，更易于入睡。

10.卧室要黑暗、稍凉、没有电子产品。把任何可能打扰你睡眠的东西从卧室移走，包括噪音、明亮的光线、不舒服的床、过高的温度。卧室偏凉可以让你睡得更好。电视、行动电话或电脑都会造成干扰，剥夺你的睡眠。舒服的床垫和枕头可以帮你好睡。睡眠的人常会盯着钟看，因此要避免钟出现在视线所及之处，以免试着入睡时还在担心时间。

11.适当晒太阳。日光是调节每天睡眠规律的关键。试着每天在户外至少晒三十分钟的日光。如果可能的话，黎明即起，或在早上使用亮度非常高的光源。如果你有难以入睡的问题，睡眠专家建议应该在早晨晒一小时的阳光，并在睡觉之前把室内灯光调暗。

12.不要醒着而仍躺在床上。如果你上床后二十分钟仍然醒着，或开始觉得担心或焦虑，最好起床做些轻松的活动，直到睡意产生。无法入睡的焦虑，会让人更难入睡。

1. Maintain a Consistent Bedtime and Wake Time.
Our sleep cycles are regulated by the “circadian clock” in our brains. By maintaining a regular bedtime and wake time even on weekends when you’re tempted to “sleep in” you will help strengthen the circadian function and help make your sleep patterns more consistent.

1.保持一致的就寝时间和起床时间
我们的睡眠周期是由大脑中的“昼夜节律钟”调节的。即使在周末你想“睡懒觉”的时候，也要保持规律的就寝时间和起床时间，这将有助于加强昼夜节律功能，并使你的睡眠模式更加一致。

2. Establish a Relaxing Bedtime Routine.
Transitional activities like soaking in a hot bath, reading or listening to music can help your mind transition from daytime activities into a more relaxed state, which will help you fall into a deeper sleep. Avoid bright light and activities that cause excitement or stress directly before going to bed, and if you take that hot bath, be sure you cool off and are not over-heated before getting into bed.

2.建立一个放松的睡前习惯
泡热水澡、阅读或听音乐等过渡活动可以帮助你的大脑从白天的活动过渡到更放松的状态，这将有助于你进入更深层次的睡眠。睡前避免强光和直接引起兴奋或压力的活动，如果你洗了热水澡，一定要在上床前冷静下来，不要过热。

3. Dark, Quiet and Cool.
These three factors are your best bet for creating an optimal sleeping environment. Make sure your bedding and clothing are comfortable, and if you have trouble achieving any of these conditions, consider blackout curtains, ear plugs, eye shades, humidifiers, “white noise” or fans.

4. Invest in a Good Mattress and Pillows.
Be sure that your mattress is supportive and comfortable. The average lifespan of a mattress is 9-10 years, so be aware when your mattress may have outlived its lifespan. Also invest in comfortable pillows and bedding, and be sure to create an environment in the bedroom that is inviting and conducive to a good night’s sleep.

5. Sleep and Sex Only, Please.
By using your bedroom only for sleep and sex you will strengthen your mental association between bed and sleep. Remove all distracting or stress-inducing elements, such as televisions, computers and work-related things out of the bedroom to create a more relaxing environment. If you find yourself regularly checking your digital clock throughout the night, just set the alarm and turn the face away from you.

6. Finish Eating At Least 2-3 Hours Before Bedtime.
Eating directly before going to bed — especially if spicy foods are involved — may cause difficulty falling asleep and discomfort throughout the night. Similarly, drinking too much may result in several awakenings for trips to the bathroom. That said, some people find a single serving of milk or non-caffienated tea to be a soothing part of the bedtime routine.

7. Complete All Exercise At Least 3 Hours Before Bedtime .
Regular exercise can make falling asleep easier and contributes to a deeper and better sleep. However, it can take up to six hours for your body temperature to drop after strenuous exercise, and a cooler body temperature makes falling asleep much easier. So be sure to complete your exercising or any strenuous activity at least three hours before bedtime for the best results.

8. Avoid Caffeine For 6-8 Hours Before Bed.
Caffeine is a stimulant that remains in your system from 3-5 hours, though it can affect some people for up to 12 hours. Even if you can’t feel the effects, consuming caffeine late in the day may be affecting your sleep cycle more than you realize. If you like a warm drink at night, try caffeine-free tea.

9. Avoid Nicotine Before Bed.
Nicotine is a stimulant, and can contribute to sleeplessness. If you smoke, your body may experience withdrawal symptoms throughout the night, and you may also experience difficulty waking in the morning. It’s one more reason to quit, and remember to never smoke in bed or when you are feeling sleepy.

10. Avoid Alcohol Before Bedtime.
Though many people think of it as a sedative, alcohol actually has a disruptive effect on your sleeping cycle and can cause multiple awakenings during the night. Ultimately, it leads to a less restful sleep.