there are certain forms of passive exercise accessible to such people
To the invalid it is, of course, idle to talk of active exercise, but
there are certain forms of passive exercise accessible to such people.
Massage, for instance, which, judiciously administered, will do for
the sick, in a modified degree, what active exercise does for the
comparatively well. It will stimulate the circulation in the deeper
tissues, and set the various fluids of the body moving in a beneficial
manner. There is also a mild form of active exercise which may be
practised by those who have the misfortune to be confined to bed, and
that is by tensing the muscles; such as clenching the hands and
contracting the toes, also by gentle contraction of the arms and legs
alternately.