How does regular exercise make us more alert and energetic?

The release endorphins which is a chemical that improves our mood helps make us more alert and energetic during regular exercise.

Endorphins also reduces the pain we feel in our body and drives us into a positive vibe and euphoria. Our outlook in life is also on the positive side during the release of endorphins.

During exercise the brain releases endorphins, the chemical that helps improve our mood.

Explanation:

I just had this question and this was the answer

answer; mistrust of the health care system;

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there