Avoid eating during exhaustion, excessive exercise, excitement, or anxiety to protect digestion.

Original passage

Another serious evil is eating at improper times, as after violent or excessive exercise, when one is much exhausted or heated. Immediately after eating there is a strong draft upon the nervous energies; and when mind or body is heavily taxed just before or just after eating, digestion is hindered. When one is excited, anxious, or hurried, it is better not to eat until rest or relief is found.