[markus_zhang]

I tried cardio and weights and they never sticked with me. They are kind of boring and unless you are into these things you can't stick for more than a couple of months.

Recently I picked up the hobby of fossil collecting and I can tell you it's excellent for your health (as long as you wear protective equipment):

- You have to hike, most likely in the wilderness (even in cities you are supposed to hike on riverside or hills, depending on the geological age)

- You have to use hammer a lot. Sometimes it's just fun to swing the thing the break rocks even you know there is nothing there (fossils most likely only reside in sedimentary stones and usually you can find some traces on its surface)

However I don't think it helps with marathons though, maybe in the long run it does, but not in a few months.

One thing I also found out was that, if I was not mentally engaged to the work/study, I would not have the motivation to workout.