The waist and abdominal belt used for low back pain is passive. It can be worn by those with weaker psoas muscles, but it is easy to rely on it. It is okay to wear it in the short term, but it is best not to wear it in the long term. If you have low back pain, try it. There is an invention patent. Yes, the negative-heeled shoes included in university textbooks are for active exercise. Since there is a national patent, I believe that the scientific nature is worthy of recognition. You cannot try the belt in advance, but you can try the negative-heeled shoes. You can find a book and go barefoot. , step on a 2cm book with the soles of your front feet and the ground with your heels. Try to see if your lumbar spine is corrected. If it helps, just wear shoes again