How can you make your muscles strong?—"By using them."
How can you make your muscles weak?—"By not using them."
What is necessary to make your muscles strong and healthy?—"They must be used; they must be rested when tired; they must be supplied with pure blood."
How should the muscles be used?—"They should be exercised in work or play."
How may they be rested?—"I may rest my muscles by changing position; by changing my kind of work or play; or by going to sleep."
Explain what you mean by changing your position.—"If I am standing, I must sit or lie down to rest them; if they are tired, because I have been sitting too long, I must rest them by standing, walking, or running."
What do you mean by changing the kind of work or play?—"If, in my work or play, my arms become tired, I must do something in which my arms may rest, though other parts of my body may be in exercise."
How may you help supply your muscles with good blood?—"By breathing pure air; by taking wholesome food and drink; and by living in the sunlight."
How does drinking alcoholic liquors hurt the muscles?—"It makes them weak, and unfit to move the parts of the body."