I so hear you on the fresh air and communing with nature thing sylvie
When I'm really in a funk or stressed, the best thing I can do for myself is grab the dogs and head for the beach. A good 3 mile walk in the wet sand, with the waves tickling my toes, bright sunshine, watching the dogs run and play....does me a world of good, and not just physically.
In other news, I am contemplating the purchase of a treadmill desk....the idea being that you very slowly stroll as you work on the computer. The treadmill is specifically designed for extended, slow use....with a max speed of 4 miles an hour, but can run for 6 hours at a stretch without wearing out the motor.
It's a bit expensive....heck, lots of expensive....but it would keep me up and moving instead of sitting in a chair during the day.
Anyone had any experience with one?