I do only in the spring time. Usually my winter months are too hectic with airsoft and school. + I am really out of shape and not as flexible.
In airsoft it isn't really practical if your wearing upwards of 30 lbs of gear or wearing really expensive things like cameras and your afraid to break them. Maybe running around with GBB pistols but PK is really meant for flight and not the fight. In airsoft you have to slow down and take in the area, where as PK your focused on one particular point, and the first thing you see is pretty much all you see that's why you never notice people nor the social surroundings.
But I need to start just running again soon or I am going to get phat.
JW, How much do you run?