What is physical exertion?

Famous quotes containing the words exertion and/or physical:

    Everyone confesses in the abstract that exertion which brings out all the powers of body and mind is the best thing for us all; but practically most people do all they can to get rid of it, and as a general rule nobody does much more than circumstances drive them to do.
    Harriet Beecher Stowe (1811–1896)

    Patience, that blending of moral courage with physical timidity.
    Thomas Hardy (1840–1928)