Legs against the wall elevated this posture, each time the duration of no more than 30 minutes, 2-3 times a day to achieve results, too long will trigger discomfort symptoms. First of all, this posture is too much pressure on the lumbar spine, and it is best for patients with lumbar spondylosis not to place their legs at an angle perpendicular to the ground. Just raise the legs, the overall horizontal position above the heart, you can achieve the same effect, but also will not have an impact on the lumbar spine. Secondly this posture will reduce the blood supply to the lower extremities, and the horizontal position of the lower extremities is too high, which will reduce the amount of blood reaching the end of the lower extremities. Patients with injuries or lesions in the lower legs and ankles are not recommended to elevate the lower limbs for too long. Patients with poor heart function and heart failure are also not advised to keep the lower extremity elevated position for too long to avoid aggravating the degree of disease. The lower limb leg elevated position is especially suitable for people who are sedentary and stand for a long time.