Lying flat with both feet up, if applied to soft tissue injuries or even fractures in the lower extremities, has the effect of promoting blood circulation in the lower extremities as well as lymphatic return, thus reducing local swelling and pain. In addition, if the legs are lifted and suspended can also exercise the muscles of the bilateral thighs, as well as exercise the muscles of the lower abdomen, because the two movements if suspended, the quadriceps of the thighs or the front muscles of the hip joint, as well as the abdominal muscles of the lower abdomen must be contracted with force, some exercise the lower abdominal muscles of the population also often do this action, exercise the lower abdominal muscles. In addition to exercising the lower abdominal muscles, but also reduce the accumulation of fat in the small abdomen and achieve the role of weight loss.