Joint cartilage provides smooth surface so that joints can glide easily during movement. Cartilage is five times slicker than ice and is made up of 80 percent water. If the cartilage is robbed of fluid, the joints will eventually creak, crack and pop – like a rusty door hinge. The increased friction causes them to degenerate quicker, eventually leading to arthritis. As we approach age 50, back pain becomes a problem. No wonder, three-quarters of the weight of the body is supported by the fluid inside the disks. When the disks in your spine lack water they begin to degenerate and herniated more quickly. Similar to driving on under-inflated tires on a car, they will either wear out faster or eventually blow out.