Non-Medicine Alternatives for Depression Treatment

I don't see the point in medicated depression treatment when just a exercise, a better environment, and nutritious food might do the job. For instance, it's a known fact that just going out and doing something physically greatly improves mental health. Anyway, the medicine they give for depression seems like too much and how do I know? Well, I took it in during my junior year of high school. It was something like prozac. It really buzzes you up to much and it probably played a role of why I got in so much trouble, lol.

Of course, as of now, I don't take anti-depressants, but the many things I do and the environment I am in keep me from being depressed, but in high school, honestly, it wasn't a good environment because I didn't have a strong image of who I was at the time. I suffered from massive inferiority compexes despite the fact I took martial arts during my freshman year and had some good classes with fun times.