Length adjustable dual-ring arm strength training device

The utility model relates to a length adjustable dual-ring arm strength training device which is used for the comprehensive gymnastic training of muscles and the arthroses of the upper limbs, the neck, the shoulder, the back and the chest. The utility model is composed of a handle-ring, a steel spring reed or an elastic rubber body, an elastic flexible sleeve and a fastening bolt device. The training device has the length adjustable to allow people with different heights, different physical types and different arm lengths to use the same training device to do the physical training. The training device is light, firm and durable, and has a varying, scientific and comprehensive training method. Moreover, the utility model can be integrated with a cervical vertebrae traction harness and a hook to construct a high-powered cervical vertebrae traction device. The utility model is not only suitable to be used in the strength limit training of the upper limbs for a professional athlete in the area of weight-lifting, the gymnastics and the body-building, but also suitable to satisfy the need of mass exercising for a driver or a desk-worker in the office, in particular for the people working with the computer in the prevention, the remittance and the auxiliary recovery of the repeatable sports injury (RSI) such as the computer disease.