It's best to lean your head back against the wall, hold a vertical pillow, or raise the table when you sleep on your stomach. During the nap, we can choose to put your head directly behind the wall. It should be noted that the lumbosacral part should be close to the backrest of the chair, or a lumbar pad should be used to support the sacral part to avoid hanging.
The best time for a nap
According to the sleep cycle, the nap time should not be too long, and it is generally better to take 10~30 minutes. In addition, it has also been pointed out that if the sleep lasts for 90 minutes, the state of inhibiting the central nervous system will not exist after waking up. This statement has certain scientific truth. If conditions permit, it is also good to go to bed at noon and have a comfortable long nap.
However, we need to remind everyone that a long lunch break will also affect the quality of sleep at night and may even cause insomnia. If this happens for a long time, it will also destroy the normal biological rhythm of the human body, which is not worth advocating.