I've been reading up on dealing with stress and maintaining mental health, and exercise comes up as the number one solution. Scientists believe our hunter-gatherer ancestors walked at least five kilometres a day, and that, clearly, is not a feature or modern life.
In thinking about Brett Victor's amazing talk, "The Humane Representation of Thought" ( http://worrydream.com/#!/TheHumaneRepresentationOfThoughtTalk ), I was wondering: what is the cutting edge of doing knowledge work while not being stationary all day long?
The nice thing about this for me is that I genuinely enjoy biking so it (usually) doesn't feel like a "chore" to go riding. And I have the good fortune to live about 2 miles from the trail-head for a set of MTB trails that I ride a lot, and about 2 miles from another trail-head for a series of gravel roads that make for a good workout. So I don't have to go too far out of my way to get MTB miles in. And if I want to go road riding, I can just carry my bike downstairs, hop on, and go.
Cutting edge? I don't know about that, but this pattern is what I've settled into.