Elastic rods are good for training the toughness of our arms. It can prevent back diseases by training deep core muscles, support and stabilize the whole spine, thus improving the flexibility and joint mobility of the body, improving the shoulder and abdominal muscles that affect posture in a short time, helping the elderly to improve joint function and reduce various pains such as back pain.
At present, there are two brands on the Internet, one is Infineon and the other is Philips. The Infineon I bought before, called G-SWING, supports flexible FM. I hope to adopt.