Rest and properly graded exercise are important factors in the treatment of tuberculosis. So long as a tuberculous patient is below normal weight and is running some temperature he is much safer at rest, even complete rest in bed, than taking exercise. During the fever stage of his disease absolute rest in bed is really necessary. After he gets better and no longer runs a temperature, exercise if taken within proper limits is of value, and under proper direction can be made serviceable to recovery. When a patient gets up to full weight he should have graded exercise and should gradually harden himself to considerable endurance. Deep breathing exercise should never be taken while the disease is active and after it is considerably advanced. There is danger of tearing loose adhesions by such exercise and again setting up the disease.