Good Martial Arts Anime?

I would really like to expand what I currently watch, which in terms of anime is nothing. Plus, I have a lot of time on my hands recently. I practice martial arts three times a week and go to the gym for about 3 days, this is also in-between my working very hard at University. I find that sometimes I have spare-time and I'm not much of a drinker, so I don't really want to go party because I'm too busy preserving my own body and spirit. I was wondering if someone could give me the name or names

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