Why can't you straighten your waist after sitting for a long time?

你是否坐太久后，常会感到腰酸「挺不直」呢?很可能是因你坐太久，有两条肌肉紧绷起来，正拉扯你的脊椎！

Diaphragm: This muscle group is attached to the front of the lower thoracic spine. When sitting for a long time, the diaphragm will be reduced and tightened. At this moment, the tightened diaphragm will often form a yoke to pull down the thoracic spine, which will make our thoracic spine stiff and feel lumbar acid.

Iliopsoas: This muscle group should be attached to the front of the lumbar spine. When sitting for a long time, it will shorten the iliopsoas muscle. At this time, the tight iliopsoas muscle will form a second yoke to pull the lumbar spine forward, making our waist more stiff!

Therefore, I strongly recommend friends who need to sit for a long time. For your waist's sake, besides getting up and walking every time they sit for a while, regular relaxation of the diaphragm and iliopsoas muscles is also a necessary maintenance lesson.

Demonstration of diaphragm self-relaxation：