I. Normal development of head lifting Prone position 1 month Repeated head lifting for at least 3 seconds 2 months Head lifting 30~45° 3 months Head lifting 50~90° with two elbow supports 5 months Can turn from one side to the other Sitting position 1.2 months Can keep head upright in sitting position for 8s 3.7 months Can lift head when pulling him up to sit 3.8 months Can keep head upright continuously II. Use elbow support to lift the upper body, parents can hold one elbow joint and use toys to induce the baby’s head to rotate from side to side. Elbow support on the ball: let the baby creep on the yoga ball (diameter 60~70cm), parents hold its lower limbs or press its waist and slowly dive to induce the baby’s spontaneous head lift. Supine head lift: baby in supine position, parents hold the baby’s shoulders with both hands and pull the baby to a sitting position, with the hips as the fulcrum, without leaving the bed. Note: Training intensity, depending on the baby, varies from a few minutes or ten minutes each time.