"If you would keep healthy, follow this regimen: do not eat unless you feel inclined, and sup lightly: chew well, and let what you take be well cooked and simple. He who takes medicine does himself harm; do not give way to anger and avoid close air; hold yourself upright when you rise from table and do not let yourself sleep at midday. Be temperate with wine, take a little frequently, but not at other than the proper meal-times, nor on an empty stomach; neither protract not delay the [visit to] the privy. When you take exercise let it be moderate. Do not remain with the belly recumbent and the head lowered, and see that you are well covered at night. Rest your head and keep your mind cheerful; shun wantonness, and pay attention to diet."

- Leonardo da Vinci, Codex Atlantico 78 v.b.