Why does a soft bed make people sleep so tired?

The soft bed compresses the blood vessels, resulting in poor blood flow and insufficient blood supply to the brain, which in turn leads to poor sleep. Weakness is inevitable the next day.

Most people think that sleeping comfortably in a soft bed is a great enjoyment, but it is actually not conducive to eliminating fatigue. Using electromyography to measure the muscle state during night sleep, it is found that the muscles in many parts of the body are often in a state of tension when sleeping in an excessively soft bed. Because whenever the body turns slightly, the soft mattress will shake and tremble. If the muscles do not maintain a certain tension, it is difficult to maintain the stability of the body. In this way, the muscles cannot be fully relaxed, that is, they cannot get enough rest. When they wake up the next morning, they will feel tired and unhappy.

On the contrary. Sleeping on a wooden hard bed looks hard, but lying on it is very stable. No matter how your body turns, the bed board won't sway. In this way, the muscles of the whole body can be fully relaxed and the rest effect is greatly improved.