Running, especially on campus, is so tiring but good exercise. It's a form of terrestrial locomotion.
I cannot say that I'm a fan of running - unless a bear is chasing me!  Do you know who started running as exercise?  I mean, it seems someone must have been crazy!
I have no idea! Walking is a lot better, as it is the stark contrast to running.
I like walking - much less jarring motion.  And I don't think you need the fancy shmancy running shoes either.  And most anyone can walk - well except those that can't of course.  What do you know about running in the Olympics?
Trust me, I do too. If I can walk to class instead of having to run there then I will, with one foot always in contact with the ground.
I definitely think it's a good idea to have at least one foot on the ground - otherwise you will just fly away!  And I guess walking is still exercise if you do it enough, so that's a good thing
Well yeah haha, though running often has both feet off the ground at certain points compared to walking.
Really - how do you run like that?  Seems it would be just one foot at a time hitting the pavement - but then again, I said I don't run, so how would I know - you are the expert LOL!
Yeah! Running has a lot of spring mechanics involved which sort of propels you off the ground when you're going fast.