title: Exercise is the best medicine.
abstract: Recent weeks have provided yet more evidence, if it were needed, that exercise is good for us - even when we are sick. Researchers have shown that people with early stage Alzheimer's disease suffer less shrinkage of the brain's memory centre - the hippocampus - if they take part in moderate exercise ( page 4 ). The proof that regular walking can slow down progression of this disease should be embraced by carers. It's effective and it's free.