Balance between mental/physical exhaustion/activity

When I've spent the day cracking books, reading and studying, or sitting behind a computer doing some work of some sort, I feel like I need to get outside and get some blood flowing. You know, "exercise". That thing people do to stay healthy by using bicycles and swimming pools and what not.

Conversely, when I've spent the day doing stuff, getting around, talking to people and things like that, I want to relax at home and read a good novel, or watch an interesting show on Discovery channel. I want to stay in the house and just "absorb", as I like to call it. Mental activity rather than physical.

When I think about it, it's kind of interesting how things balance out. When I've spent all day on a chair, forcing my brain to take in or dish out information, my body starts feeling sluggish, and I want to do some physical activity to clear the blood vessels. On the other hand, after tiring myself out by going from place to place and talking to different people (which drains me as I have recently discovered) I don't want to go anywhere anymore. I just want to rest and let my mind take in new information from my surroundings at it's own pace.
In other words, when I'm mentally exhausted, I want to occupy myself with physical activity, and when I'm physically exhausted, I want to occupy myself mental activity. Actually, the latter is the reason why I'm blogging right now. I don't know if that's how other people feel, but this occurred to me just a while ago, and I thought it's funny how it works out.

The phrase "getting away from a hectic lifestyle" does not mean bugging out on the couch with a coke, chips, and rented movie. Taking a brisk cycle with nature or reclining back to study a classic work of literature might seem a bit like "work", but it's all really in the mind. An ideal job is doing something you like, but with more deadlines. A hobby is doing something you like that might be considered work, except without deadlines. Personally, I wouldn't bug out on a couch with a bag of chips when I have free time unless the day has been a really nasty one, in any sense of the word "nasty". I don't know why I'm telling you this. Just felt like saying it. Now you know a bit more about me. Congrats.