The spinal cord and the disks also become older. During the aging process, the spinal channel is narrowed by the the degenerated disks, which affects the function of the spinal nerves.
The degenerated tissue of the disks cannot withhold the continuous stress. It can penetrate the spinal channel and pinch these nerves. The patient can have a diffuse back pain, it also can be a numbness of the buttock and the legs, it also can lead to less stress resistance and overall weakness. It is typical the symptoms increase while stretching.