This is interesting, it seems to be one or the other. Personally I like development so I do actively enjoy doing some in my free time, obviously on things I want to. I don't see it as "I've already done 9 hours today so I'm going out for a ride instead.".
Thing is, you probably should, even if you don't want it. Being in front of a screen 9 hours a day is already too much for long term health (cough cough looking myself in the mirror).
This. There are studies that shows there is a pandemia in some countries of heart and other health problems directly associated with the lack of sun time.
And in contradiction to what suncream vendor would say, this can't be solved by vitamin D supplements.
