It is not appropriate to take a nap before meals. First of all, after studying or working all morning, the whole person is hungry and tired. At this time, food is needed to supplement energy to maintain normal and energetic physiological functions. If there is no food to meet basic physiological needs, it should be difficult to fall asleep. Furthermore, if you fall asleep at this time, it will slow down the whole circulation of your body, and you will feel tired and lose your appetite after waking up.

Taking a nap after exercise is a wise choice. First of all, you mentioned that "walking slowly is not strenuous exercise, which will not lead to gastrointestinal diseases, and regular aerobic breathing will help digestion and absorption of gastrointestinal peristalsis". If you fall asleep immediately after lunch, it will lead to symptoms such as indigestion and abdominal discomfort. After walking slowly for 30 minutes, it will help the digestion and absorption of food. At this time, all parts of the body work well, feel comfortable, fall asleep easily, wake up easily after sleeping, and feel energetic. Of course, I suggest you slow down in the last ten minutes during the 30-minute walk. This change is easy to transition from walking to lunch break.