and you can tell someone that this happens that you get upset, that you get sad or angry.

你可以告诉别人，这事发生的时候，你很泄气，你觉得很伤心或者很生气。

I get so upset 课堂 - SpeakingMax英语口语达人

and the friend could mention that when he exercises, he feels more alive and more invigorated.

而你的朋友提到当他锻炼的时候，他会感觉精神焕发，充满生气。

That's what课堂 - SpeakingMax英语口语达人