Winter cycling: there's no bad weather, just the wrong clothing. Mountain biking on packed snow in the forest will warm you up, even when it's -5c. And you don't have to buy a lift ticket to ski on two wheels.

Cycling without fresh air is like an orangutan playing the violin. What comes out is sound, but it's not music. Cycling and skiing are like meditation; you're totally concentrated and in the moment. Exercycling while watching TV can't possibly give you that kind of flow.

I learned Latvian on long winter walks in the snow with my wife. Cold air is invigorating.

Evolution designed humans for motion. Couch potatoes, by violating evolution's deal terms, are prescribing their own extinction.

As with writing and everything else, you get what you give.