Eat smaller meals – large meals can cause heartburn by putting pressure on the esophageal sphincter
Sit up while eating – don’t eat lying down or leaning backwards
Eat slowly – I use smaller utensils and watch TV or read while eating, which naturally causes me to eat slowly
Be mellow – stress negatively affects digestion
Eat low fat – fatty, greasy foods cause indigestion
Skip the hot spices – hot peppers only cause a slight increase in caloric expenditure, so if spices cause you stomach pains, skip them
Source: Hatfield PhD., Frederic. Fitness: the Complete Guide. Carpinteria: International Sports Sciences Association. 9th ed., 2018. Print. Pp. 55, 58.