Fluid availability and spinal movement are fundamental ingredients to rehydration. When the jelly-like material inside the discs has a problem with rehydration, the discs start to shrink.
The problem starts to rise when the heavy load applies to your dehydrated spinal discs. It becomes much more significant when the load is distributed unevenly throughout the spinal discs. When the discs lose the ability to absorb the shocks, it puts all the weights on the outer ring of the discs. The outer ring, the tough part of the spinal discs, is not designed to carry such a heavy load. Now, this puts the spinal discs in perfect condition to collapse and accelerate degenerative process.