For unknown reasons, there is a dip in the circadian alerting about 8 hours after the beginning of the cycle. This is why people sometimes experience that “2:30 feeling.”
Hunh. That makes sense. I didn’t realize that I was why I feel tired in the afternoon. I thought it was because of eating lunch just before.
Lunch could still be an important factor, postprandial somnolence is a well-known phenomenon. There might be a phenomenological difference between that and sleepiness, though. We often do not properly distinguish between sleepiness and fatigue.
Hunh. That makes sense. I didn’t realize that I was why I feel tired in the afternoon. I thought it was because of eating lunch just before.
Lunch could still be an important factor, postprandial somnolence is a well-known phenomenon. There might be a phenomenological difference between that and sleepiness, though. We often do not properly distinguish between sleepiness and fatigue.