For keeping the leg elevated against the wall posture is recommended 2-3 times a day, each time can last about 10-15 minutes. Keeping the leg elevated against the wall daily not only promotes blood flow back to the lower limbs and strengthens the leg muscles, but also enhances the stability of the knee joint and reduces the occurrence of knee disorders. But it should be noted that this action is not more than good, each time last about 10-15 minutes can be, long time to maintain may cause excessive pressure on the spine, easy to cause spinal disorders, in addition, if the lower limb horizontal position is too high, it will reduce the amount of blood at the end of the lower limbs, may also have an impact on the heart and brain. When raising the legs against the wall exercise, time and intensity should be gradual, try not to appear leg numbness, leg cold, etc. In addition, before and after the exercise can be combined with jogging and other aerobic exercise to achieve better results.