Back rubbing is the most common health care method in ancient times. There are three important meridians in the back. Along the spine is the Du meridian, which is the yang of the human body. The distance between the two sides is 1.5 inch, which is the bladder meridian and is related to human internal organs. The key to rubbing your back is to be "light". The correct way is to bend your fingers slightly together, open your palms and pat your back, and follow the spine from top to bottom, from the middle to both sides. The best time for back massage is from 3 pm to 5 pm, which is the time to pay attention to bladder meridian and has the best health care effect.