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.
step change. ( step changes plural ) A step change is a sudden or major change in the way that something happens or the way that someone behaves. n-count usu sing, usu N in n. We now need a step change in our secondary schools to match that achieved in our primaries.