Lying flat with legs elevated movement training has some benefits, including exercising the muscles, promoting venous return to the lower extremities, and relieving swelling of the lower extremities. However, it should be used under the guidance of a doctor and selected according to the patient’s etiology, symptoms and treatment goals. 1. Exercise muscles: double leg raise can exercise bilateral thigh quadriceps and hip flexor muscle groups, which can increase the stability of the knee and hip joints. 2. Promote venous return in the lower extremities: For patients with large varicose veins or valvular insufficiency of the deep veins, it can effectively relieve swelling and pain in the lower extremities and slow down the process of varicose veins. 3. Relieve swelling of the lower limbs: standing or walking for a long time, the venous return of both lower limbs is not smooth, there may be swelling and other discomforts, elevation of the lower limbs in the lying position can make the blood return to the heart more easily and reduce swelling, especially for the lower limb fracture injuries and surgical history of the population, can reduce the venous stagnation of lower limbs and promote better healing of the wounds. There are many benefits of lying legs elevated, but also to be carried out within their own tolerance, so as not to cause other diseases.