Blood backflow has certain benefits to the body, for example, when practicing inversion there will be blood backflow, at this time will have a certain effect on the cerebral blood vessels, especially the capillaries of the brain, the blood supply of the capillaries of the head, have a certain improvement effect. For transient cerebral ischemic attack, such as TIA attack, the blood backflow will increase the capillary filling at this time, and the effect and benefit of improving dizziness and headache will occur at this time. For patients with chronic cardiac insufficiency or myocardial ischemia, proper reversal of blood flow can strengthen the blood supply to the heart and increase the amount of filling of the heart, which has certain benefits and advantages for improving heart function.