system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do I never feel "fully awake" until evening?
gpt
I notice exercise is not mentioned in your basic description above. If you are not getting some form of physical activity that gets your heart and lungs working and little sweat going, that could be the key to your issue. It can be surprising to people how a little bit, everyday will change your alertness levels to be more in tune with the daily cycles of day and night. Not to mention the other good "side effects" of regular exercise.