Yes, there was much more outdoor activity in those days. We were not a nation of couch potatoes!
That's only because those of us from then were younger then but today we are damned sure not younger at all. Surprisingly, we are now about sixty years less young.
Couch potatoes grow from mental breakdown which can hit at any age, especially with unemployment lurking in the wings, or employment that exists more in the name than in the pay. Only when all else has failed you do you feel any urge to die slowly in a slouch on a couch.
:-)