Note 18 — Chapter X · REMEDIAL.

“The need for exercise is one of the numerous sensations which lead human beings to perform actions necessary for the preservation of life or health. The need for repose is called fatigue; the need for exercise has not received a special name, but deserves one quite as much as hunger, thirst, &c. Under the influence of deficient exercise, certain materials which should be used up each day by work, accumulate in the human machine, the wheels of which they encumber, and the working of which they clog.... It is necessary, for the perfect balances of nutrition, that the reserve materials should be used up as fast as they are formed.” Dr. Fernand Lagrange, in “The Physiology of Bodily Exercise.”