Boxing is one of the most effective muscle relaxer I know. It is also demanding from it's technique, and included to some other dynamic trainings it is the best one can do to one's body.
When I was living in Finland, I used to ride long trips with my bicycle. Once I rode 200 km in one day (From Helsinki to Turku). It took together 12 hours. All my muscles were hurting after.
In-line skating - alone or with friends, is fun. One can do it hours, without even noticing doing sports! In Vienna it is nice to skate at the Danube: One can find long roads going kilometers on there (see my photogallery/Danube in Vienna).
Apart from sports, one of my big interests are castles. When I travel, I am very impressed not only of the beauty and power of the nature, but also of the castles! To see one on the top of a hill, in the middle of a peacefull nature... it is standing there like the most impressive statue - big and powerfull, historic and mystic. When I see one, I can not take my eyes away from it.
Ok, sometimes I "get grazy" for crossword puzzles. I might spend the whole summer travelling around with the magazines in my bag. I even might stay awake the whole night doing them. And- if you are in Finland, you don't even need to put the light on during the night to see what you are writing at...
Now my life is quite fullfilled with music. As a mucisian I realised, that one of my main hobbies became my work. By the way, nowadays during the summer holidays - among practising - I am studying french. I think languages are one very important way to learn more about this world, it's history and cultures, and of course about people.
Tanja