(I) Alzheimer's is a degenerative brain disease that usually begins gradually, causing a person to forget recent events or familiar tasks. (II) People who exercise regularly have healthier brains. (III) How rapidly it advances varies from person to person, but the disease eventually leads to confusion, personality and behaviour changes and impaired judgment (IV) Communication becomes more difficult as the disease progresses. (V) Eventually, most people with Alzheimer's disease become unable to care for themselves.