Using the dark side... to excerise?

Long story short: awhile ago, I was broken up with for etc reasons. Which really pissed me off (at her because of shallowness & at me for not noticing signs during relationship)

So I decided the stress was bad, so I started working out.

By listening to the right music and thinking about what happened, I would get really pissed off. Then I would run. and run. and run. Rarely did I ever feel tired.

This went on for like 3 months (going into summer)

Now I'm over it. I'm cool and the whole relationship, while it really sucked, doesn't spark any emotional anger now.

The problem is, now I can't run worth crap. I run now because I did/do enjoy the feeling of night air. But now I get tired a LOT easier. What's dumb is I have the muscles from several months ago still!

What's going on?

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If anyone wonders if I have anger issues or something, I might, but this is like the first time I've ever felt this cheated and pissed and stupid (was my first gf)
Using the dark side... to excerise?
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