Bad sitting posture will not only make the back ache, but also make people suffer from waist and shoulder diseases, so maintaining a good sitting posture can not only relieve the disease, but also protect the back. When sitting in a chair, try to keep your spine upright and don't bend. Now that we know that bad sitting posture will bring great harm to people's backs, it is best to maintain a good sitting posture, whether in daily life or at work, as long as it is about sitting posture, which not only plays a role in modifying the body shape, but also plays a role in maintaining the back. When people are sitting, try not to lean, which will easily lead to the bending and deformation of the spine over time. It is best to stay upright all the time, only in this way can we prevent the occurrence of various spinal diseases.