[sergiosgc]

Something physically taxing and which requires complete attention. My best example is skiing. Try to think about a hard problem at work, while doing 15mph on a black slope, and you'll soon be hugging a tree or doing a five point yard sale[1].

Of course, you generally can't ski often enough to relax. Other activities abound. Tennis occupies mind and body, most team sports too. Swimming, cycling and running don't cut it for me, but for some people do.

[1] http://www.urbandictionary.com/define.php?term=yardsale

[mikeg8]

30mph*

If I'm only doing 15, i bet I'm still thinking abut work :P

[sergiosgc]

I learned to ski as an adult. I get to 30mph comfortably (my max gps tracking was at 72km/h), but certainly not on difficult slopes. I need to find a good stretch of straight wide slope so I can schuss and pray at the same time :-)