Disadvantages of riding: 1, spinal and lumbar injuries. The main symptom of this injury is pain. If the shoulder hurts, the pain in this part is mainly caused by the long tube and low handlebar on the car. My neck hurts. This phenomenon is often accompanied by shoulder pain, and the third is low back pain, which is often caused by straightness when riding, because more strength will increase the burden on the waist and lead to waist fatigue. 2. Joint injury. The main symptom of this kind of injury is pain. There are mainly pain in the upper knee and pain in the back of the knee. 3. Upper limb injury. This kind of injury is mainly due to long-term compression of upper limbs. If the movements of the arms do not change much in a certain period of time, the blood circulation of the upper limbs will be relatively reduced, which is of course unfavorable to the body.