If someone says hello to me I'll say hello back. I'm a quiet/shy person really, not that any of you will believe that Joggers who acknowledge each other, that's just weird.
Not really LD. It's the common denominator. I used to cycle and used to find myself nodding or giving a wave to other cyclists I'd pass. It's the same as walking a dog. You find dog owners always speak to each other. Good way of meeting people.
I find it weird. I'm out running, normally as red as a beetroot and out of breath, last thing I want to do is acknowledge another person! Weirdo's, the lot of 'em
In the days gone bye it was normal up here to talk and say hello. Nowadays you have to judge who you are going to talk to. I always say good morning etc, but there are some right weirdos out there. May be they are that pissed of with their lot in life that they are not interested.