I found this op-ed a few weeks ago where the author, a medical doctor, wonders how she could have better helped her aging parents. One way would be for her to have been a physical therapist, as she says:
A doctor’s familiarity with obscure diagnoses — and the ingrained habit of reviewing them compulsively when something goes wrong — is considerably less helpful for the old than an understanding of some normal activities, like sitting, standing and tottering around. Unless you are a rare physician indeed, you know nothing about the process of rising from a chair except to politely conceal your impatience while it is accomplished.