Persons who are very weak and unable to be on their feet for any length of time need not, for this reason, forego the benefits to be derived from systematic physical exercise.

A low chair, with straight or very lightly curved back and no arms, or a rocking chair of similar construction with a wedge placed under the rockers in such a manner as to keep the chair steady at a suitable angle, is well adapted to the practice of a number of corrective movements, such as rotating of hips and waist, forward and sideward bending of the trunk, the various arm and neck exercises, bending and twisting of feet and toes, the internal massage (Exercise Number 12) and "Breathing Exercises to be Taken in Bed," in previous Chapter.