Hardware and software for deep sleep: the health benefits of sleeping naked, bed selection tips and standard sleeping posture

Sleeping naked is a health care method. It is inexpensive and requires no cost; it is simple and everyone can master it; it is comfortable and everyone is unwilling to give it up. More importantly, it is healthier. Some people have the habit of sleeping naked, while others think that sleeping naked is uncivilized. So is sleeping naked advisable? What are the benefits of sleeping naked? (1) Sleeping naked gives a feeling of freedom and pleasure, which is conducive to enhancing the secretion of sebaceous glands and sweat glands, which is conducive to skin excretion and regeneration, which is conducive to nerve regulation, and which is conducive to enhancing adaptability and immunity. (2) Sleeping naked is extremely effective in treating tension-related diseases, especially the tension in the abdominal visceral nervous system, which is easy to eliminate. It can also promote blood circulation and greatly improve chronic constipation, chronic diarrhea, as well as back pain, headache and other diseases. At the same time, sleeping naked also has a certain calming effect on people with insomnia.

Experts have clearly pointed out that sleeping in tight underwear is detrimental to health. Therefore, as a healthy lifestyle choice, you might want to try sleeping naked. Human skin has many functions, such as absorption, immunity, and gas exchange. Experts believe that wearing underwear affects the skin's gas exchange, hindering metabolism. Those who were skeptical but tried sleeping naked found that their shoulder pain miraculously disappeared, and they slept much better. Some who have tried it say, "Sleeping without underwear is indeed very comfortable," and it's beneficial for common ailments such as vaginitis, hemorrhoids, athlete's foot, and snoring. However, there are two points to note when sleeping naked: First, avoid sleeping naked in communal living situations or when sharing a bed or room with children. Second, wash your genitals and anus before bed and shower frequently. For urban dwellers who always strive for health and beauty, try completely removing your underwear before bed and experience the transcendent feeling of being a "sleeping beauty."

While people are increasingly focused on their quality of life and physical health, they often neglect the quality of their sleep. Back pain is a common ailment among modern people. Besides poor work habits and posture, the most important reason is insufficient relaxation and rest during sleep, which is largely related to the quality of the bed. Hard and thick mattresses are not ideal for health. People often believe that a firm mattress with many springs is good for their health, but this is not the case. Experts warn that sleeping on a hard mattress is not necessarily healthy. While a mattress that is too hard may not seriously affect spinal health, it puts pressure on the shoulders and hips, causing discomfort. For those with lower back pain, sleeping on a hard wooden bed is especially unsuitable, as it may worsen their condition. In such cases, sleeping on a mattress is much healthier than not sleeping on one.

Secondly, a thicker mattress is not necessarily better. The thickness of a mattress is not directly related to its support, especially for spring mattresses. If the spring thickness remains the same, adding more padding only improves comfort, not support. A latex mattress about 12 cm thick with a high density, reinforced with a hard wooden base, provides sufficient support. However, over time, latex hardens, reducing its elasticity. For a durable spring mattress, a spring thickness of 12-18 cm is ideal. A mattress that is too firm does not provide balanced support for the lower back and spine, preventing the spine from maintaining its natural curvature and causing pressure on the shoulders and hips, resulting in discomfort. A mattress that is too soft causes the spine to bend downwards, leading to lower back fatigue and, in severe cases, back pain. Therefore, a mattress should be of medium firmness. Don't choose a mattress solely based on firmness. A helpful tip is to sit on the edge of the mattress and then stand up. If the area where you sat initially sinks, the mattress is too soft. You can lie flat on the bed and try inserting your palm into the gap between your lower back and the mattress. If your palm can easily slip through the gap, the mattress is too firm; if your palm fits snugly against the gap, the firmness is moderate. If you are buying a double mattress, it's best to test it with your sleeping partner. The heavier person can roll over on the mattress to see if the movement affects the other person. More springs don't necessarily mean better. The quality of a mattress cannot be judged solely by the number of springs. The type and density of the springs also affect its support. Independent springs provide stronger support than interlocking springs because each spring can expand and contract independently, supporting different parts of the body and maintaining the natural curve of the spine; conversely, interlocking springs, being connected, cannot naturally support the body. The low-profile design of independent springs reduces friction between individual spring wires, making the springs more durable and reducing friction noise that may disturb sleep. Additionally, the denser the springs, the stronger the support; therefore, pay attention to the ratio of mattress size to the number of springs.

Ancient Chinese medicine believed that when sleeping, one should "lie on one's side with knees bent, which benefits one's energy and is better than lying flat on one's back. Confucius said, 'One should not lie like a corpse,' hence the saying, 'One should not tire of lying down when sleeping, nor should one tire of being in a comfortable position when waking.'" This means that lying on one's side with knees bent is better than lying flat on one's back. Modern medical research suggests that lying prone hinders chest expansion, affects breathing, reduces oxygen intake, and is detrimental to metabolism. Simultaneously, the heart is compressed, increasing resistance to heartbeats and affecting blood circulation. Therefore, patients with arrhythmias and heart disease should lie on their side, not prone. When lying on one's side, internal organs are under less pressure, the chest moves freely, facilitating breathing, and the heart is not compressed by the arms or blankets. Legs can be easily bent and extended, and the body can turn freely. Traditional Chinese medicine believes that sleeping in this position does not harm the heart's energy and can quickly calm the brain, shifting it from an excited to an inhibited state, allowing one to fall asleep soon. For those with poor blood circulation, weak cold resistance, and who are sensitive to cold while sleeping, sleeping on their side allows for maximum muscle relaxation without compressing internal organs. It keeps the heart, liver, lungs, stomach, and intestines in their natural positions, ensuring unobstructed breathing and facilitating the movement of food from the stomach to the duodenum. Ancient health practitioners also emphasized the importance of sleeping in a "bow-like" position, recommending the following standard posture: lying on the right side with the right leg bent and the left leg straight; bending the right elbow and supporting the head with the palm; and extending the left arm and placing it on the left thigh. This sleeping posture is beneficial to health. Sleeping on the right side is best because the heart is on the left; lying on the right side reduces pressure on the heart, promoting free blood circulation. Sleeping on the left side compresses the heart, which is particularly detrimental to those with heart conditions. For the elderly, whose internal organ muscles have become weak and whose gastrointestinal motility has slowed, lying on the right side facilitates the movement of food from the stomach to the duodenum, promoting digestion and absorption and providing more nutrients to the body.