Changes with Age. In most cases, a person's normal respiratory rate will change with age; younger adults, children, and babies will typically have faster respiratory rates, because as people age, their breathing usually slows down.
Modic changes are pathological changes in the bones of the spine, the vertebrae. These changes are situated in both the body of the vertebrae and in the end plate of the neighboring disc.
1 Young's modulus measures the resistance of a material to elastic (recoverable) deformation under load. 2  A stiff material has a high Young's modulus and changes its shape only slightly under elastic loads (e.g. diamond). A flexible material has a low Young's modulus and changes its shape considerably (e.g. rubbers). 2  A stiff material requires high loads to elastically deform it-not to be confused with a strong material, which requires high loads to permanently deform (or break) it.