The Science of Sleep

a. Indoor light and noise 

- Bright light affects the secretion of melatonin, thus, interfering with the sleep rhythm. At night, the darker the light in the room, the more favourable it is for melatonin secretion.

- In addition, people's hearing is more sensitive than their eyesight at night. During sleep, external noise can interfere with falling asleep and deep sleep, thus affecting the whole night's rest. Therefore, a quiet sleep environment helps to improve the quality of sleep.

b. Room temperature and air quality

- Ambient temperature has a great impact on sleep. An environment that is too hot or too cold can disturb sleep. Generally speaking, a cooler environment is more conducive to falling asleep and staying asleep.

- Poor ventilation or air pollution can affect the quality of sleep, so keeping the air in the room fresh is also very important for sleep. If necessary, an air purifier can be placed in the room.

c. Bedding and pillows 

- Comfortable bedding has a high degree of importance in determining the quality of sleep. When choosing the right bedding, it is recommended to use a quilt with good breathability, so as to avoid being woken up by heat or catching cold in the middle of the night.

The Science of Sleep

a. Daylight intake

 - Daylight intake has a similar effect on the human body as the indoor light factor above, which affects the body's melatonin secretion. If you are not exposed to sunlight for a long period of time during the day, your melatonin level will increase, and you will feel drowsy and sleepy more easily and have poor physical performance throughout the day, which in turn affects your melatonin secretion at night.

b. Eating before bedtime

 - Eating too much before bedtime, or eating too late, can put a lot of strain on the body's digestive system. During sleep, the body needs a lot of energy to keep the blood flowing through the muscles, as well as to replenish physical energy. Instead, most of the energy is taken up by the digestive system. Therefore, the more energy your digestive system needs, the worse your sleep quality will be.

c. Daily emotional stress

 - The human body secretes more adrenaline when under stress. As a result, the heart rate, blood pressure, respiratory rate, and blood sugar level will rise sharply. As a result, the brain wave frequency accelerates, and the body's level of alertness and muscle tension will immediately increase. Hence, it is very difficult to fall asleep under this kind of circumstance. 

d. Sleeping position

- In addition, sleeping posture is also one of the main reasons affecting the quality of human sleep, interested partners can find a related tweets in the history tweets of this account.