The present invention is to attach a belt (belt) holding the ankle to prevent the back pain and to prevent the treatment, that is, sit-up exercise in bed for back health. Many modern people, both young and old, complain of low back pain (腰痛). I know that sit-ups are good for preventing and treating back pain, but doing sit-ups at work or at home is not easy. You have to lie down and grab your ankles. The present invention is to make the hook at the bottom of the bed before going to bed, or wake up, you can conveniently and easily sit up. The inventors said that when they taught as a teacher, they had a pain in the lower back, but they did not have any special illness. I decided to do sit-ups, and after six months, I had a strong waist and confidence in my life. Promoting this design is sure to contribute greatly to the people's back health. For reference, the inventor's bed is a little old, so the mat is turned off, so the veneer plywood of about 1.2 cm is laid down to a mat size, so it is suitable for your taste.
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