1) Exercise ferments the humors, casts them into their proper channels, throws off redundancies, and helps nature in those secret distributions, without which the body cannot subsist in its vigor, nor the soul act with cheerfulness.
Joseph Addison, The Spectator, July 12, 1711English essayist, poet, & politician (1672 - 1719)
2) Walking is the best possible exercise. Habituate yourself to walk very far.
Thomas Jefferson 3rd president of US (1743 - 1826)