Most often we incline to insist on exercise, and are led to do so from a belief that many people walk too little, and that to move about a good deal every day is well for everybody.

I think we are as often wrong as right.

A good brisk daily walk is for well folks a tonic, breaks down old tissues, and creates a wholesome demand for food.

The same is true for some sick people.

The habit of horse-exercise or a long walk every day is needed to cure or to aid in the cure of disordered stomach and costive bowels, but if all exertion gives rise only to increase of trouble, to extreme sense of fatigue, to nausea, to headache, what shall we do?
And suppose that tonics do not help to make exertion easy, and that the great tonic of change of air fails us, shall we still persist?
And here lies the trouble: there are women who mimic fatigue, who indulge themselves in rest on the least pretence, who have no symptoms so truly honest that we need care to regard them.