Without leaving the bed surface, the left heel slowly slides toward the hip, flexing the knee and hip joints to maintain a neutral position to move to the terminal end, while hooking the toes, and when a slight pulling sensation is felt, hold it. The heel does not leave the bed, slowly slide towards the end of the bed, when the whole unilateral lower limb touches the bed, tense the toes, when you feel a slight pulling sensation, hold it, slowly place the ankle to the neutral position. Switch to the right leg for activity, the right heel does not leave the bed surface, slowly slide toward the hip, flex the knee and hip joints, maintain a neutral position activity to the end of the terminal end, at the same time, hook the toes, feel a slight pulling sensation, hold, the heel does not leave the bed surface, slowly slide toward the end of the bed, when the whole unilateral lower limb touches the bed, tense the toes, feel a slight pulling sensation, hold, slowly place the ankle joint to a neutral position. The left heel does not leave the bed, slowly slide towards the hip, flex the knee and hip, keep the neutral position to the end of the activity, at the same time, hook the toes, when you feel a slight pulling sensation, hold, the heel does not leave the bed, slowly slide towards the end of the bed, when the whole unilateral lower limb touches the bed, tense toes, when you feel a slight pulling sensation, hold, slowly place the ankle joint to the neutral position. Switch to the right leg for activity, the right heel does not leave the bed, slowly slide toward the hip, flex the knee and hip joints, keep the neutral position activity to the end of the terminal end, at the same time, hook the toes, when you feel a slight pulling sensation, hold, the heel does not leave the bed, slowly slide toward the end of the bed, when the whole unilateral lower limb touches the bed, tense the toes, when you feel a slight pulling sensation, hold, slowly place the ankle to the neutral position. Source: Dr. Yurai