Benefits: This type of bed board has good support, which can keep the back muscles at rest and protect the lumbar spine. Especially for children whose bodies are still developing, it can prevent hunchback and other phenomena.

Disadvantages: for thin people, skin damage will occur. Moreover, the hard bed does not fully meet the needs of human body curve, which will bring burden to muscles and spine and affect the quality of sleep. You may have a backache after getting up.

Advantages and disadvantages of sleeping in a soft bed

Benefits: A soft mattress can give the body a full rest and relax the body muscles that have been working during the day. For example, the cervical spine, spine and waist, which have been upright during the day, will stretch the body on the soft bed, so that these three parts will not be as hard as during the day and get a rest, which will effectively relieve fatigue and help sleep. Soft mattress can let the body breathe, breathe, but not stuffy, absorb moisture and heat.

Disadvantages: Sleeping on a soft bed for a long time, whether lying on your back or on your side, will cause abnormal curvature of the spine. In light cases, the normal physiological curve of the human body will change, making people lose their original health and beauty, and may also form deformed bodies such as shoulder deviation and hunchback. The change of human body shape will also cause certain pressure and even damage to human internal organs, which will do harm to people's health. For patients with low back pain, too soft bed will also change the normal physiological curvature of lumbar spine, which will lead to the overload of ligaments and intervertebral joints around the spine and aggravate the symptoms of low back pain.

To sum up, the bed is too hard and too soft. The ideal bed should be moderate in hardness, and the cotton pad with a thickness of about 10 cm has the best hardness. Such a thick cotton pad can meet the needs of human body surface curve, maintain the integrity and normal physiological curvature of the spine, and is beneficial to sleep and health.