Lecture on high temperature and health

The main problem is the chair. It's no use changing it to a short one, or it's no use trying to find another way. It's best to keep your back straight when sitting and working, even if you are not used to sitting. Only when you straighten your back will you really feel comfortable in the future. Cervical and spinal diseases are caused by long-term bending of your back. People's backs are straight when sleeping and walking. Long-term back distortion suddenly becomes uncomfortable, and even leads to nerve compression, which can't work and grow normally.