I also sat here for a long time, but I also sat in front of the computer all day. You can change your sitting posture, straighten your waist and pay attention to the level of your spine and head. Every centimeter forward of your spine will put more pressure on your brain, which will cause migraine in the long run. Straightening up can prevent your stomach from becoming fleshy. Sit on a stool with only one third of your hips. If you sit on it all, it will lead to relaxation, relaxation and sagging of hip muscles. At the same time, if it is convenient, you can stretch your legs at about 40 degrees. Toe down, feel sore calf, change the other one. That's all there is to it. There is still a lot to say, such as not sitting on the stool for half an hour after dinner. The important thing is to persevere.