Many parents ask in the background, the baby is 5 months old, and when he sits, he keeps leaning forward is he behind in development? What should I do to exercise? Some parents also ask, “What should I do if my baby is 8 months old and still leans forward when sitting? Is he not strong enough at the waist? Low muscle tone? Today we will talk about the baby sitting development of those things! Understanding Sitting Development Actually, babies can sit against the sofa at about 4 months of age. Find a corner of the sofa and let the baby sit against the sofa every day, it doesn’t need to be a long time, about two to three minutes will do. My baby was 4 months old when I gave him the first time to sit against the sofa, his expression is still fresh in my mind, very new, a little bit unbelievable, and a little bit of excitement, with a smile, look at me, look forward. 5 months, the baby should be able to support their own hands in front of the front of the front leaning. Typically around 6 months babies begin to sit upright and alone. Neonatal period: flexion is dominant, the crista cannot be fully extended, the head is tilted backward when its shoulders are supported and pulled up, and it is fully tilted forward and unstable when it is presented in the sitting position. 2~3 months: the crista is obviously stretched, the crista is bent forward in a semi-posterior position when sitting, and the head can be erected. 4~5 months: support into sitting position when the crista stretches, for the stage of sitting with support, the head is stable. 6 months: can sit alone, but need both hands in front of the support, slightly curved vertebrae, arched back sitting. 7 months: the crestal extension is at right angles to the bed surface, which is the stabilization stage of sitting, called the straight-back sitting stage. 8~9 months: Straight-back sitting position is stable, and the body can be rotated back from side to side, which is called the twisting sitting stage. You can play freely in the sitting position or change from the sitting position to other body positions. Do not single training sitting Baby sitting development is the need for all parts of the support, some parents in the training of baby sitting, just simply training sitting, often ignoring other skills. This can easily lead to a long training time and be ineffective. When the baby shows these signals, it means that a more practical sitting position can be acquired: 1. The ability to control the head is mature. 2. Supportive upper limbs in the prone position, from elbow support to hand support. 3, Crest extension to the third lumbar vertebra (equivalent to the level of normal pediatric crest development at 6 to 7 months). 4.The hip joint can be fully flexed and there is a separation movement with the trunk. Home training should pay attention to the method Home training is generally more fun and easy for children to accept. The following provides several family easy to operate straight back sitting training methods: 1, let the baby sit on the floor cushion, put a small table in front of the small table height is just right for the baby to sit straight back to play with toys. Parents in the back ready to protect, such as sitting unsteady, no rush to hold the baby, you can be in the baby is about to fall, slightly behind the top, give the baby a support, as far as possible, let the baby adjust themselves. If the baby’s ability is really weak, you can hold the baby’s hip. 2, the baby is sitting position, parents will place the toy in the baby above, tease the baby straight waist to reach out to grasp the toy. Protection methods with the first. 3, stooping enough games: parents hold the baby’s waist, let the baby stoop to reach the toys on the table, pay attention to let the baby stooping action is not too fierce, you can use your hand to slightly hold the baby’s stomach. Then straight back, straight back as much as possible to let the baby force themselves, such as the baby straight back difficulties, you can slightly support a stomach. 4, sitting trunk rotation game: baby sitting on the floor cushion or dining chair, or vertical hold, parents behind the baby and baby play hide and seek game, let the baby twist to find. 5, pull both hands to sit up: baby supine position, parents pull the baby’s two hands to let the baby sit up, pull up gently press the baby’s legs, the baby easier to sit up. 6, pull one hand to sit up: baby supine position, parents pull the baby a hand to sit up, sit up process, let the baby’s other hand support on the floor cushion, pay attention to do not use force. Pull up the same can gently press the baby’s legs. 7, let the baby sit on the dining chair to play with toys or eat complementary food. 8, let the baby sit on the waist stool or leaning on the baby carriage when going out. Parents can randomly choose the above methods, can be alternated with a variety of methods. Training is a process from quantitative to qualitative changes, home training is very important to provide more natural opportunities for the baby to take a sitting position, and happily complete his daily activities. Of course, some babies 8-9 months can not sit straight back, parents are very worried, in this case it is recommended to take the baby to the hospital in a timely manner to comprehensively assess the baby’s development.