Contrary to popular belief, attending a concert is a lot more grueling than it seems.
Now, I believe that a sport is any activity involving physical exertion, where one person or team competes against another person or team. I see that one would not connect this definition to a concert, as you are not necessarily competing for anything, but I do believe one (and by one I mean me) could make a valid argument that you are competing for a good spot against everyone around you, and you are battling against yourself for survival.
Did I eat enough before this? Did I remember to drink water? Can I stand for seven hours straight? Did I consume enough nutrients to make it without passing out or throwing up in this small cramped room? Will surrounding myself with all these people mean the intense body heat will kill me?
Assuming you have had water and eaten at least some amount of food, and you are going to make it through the night without passing out, are you in a spot where you will be able to see the artist? Will you need to push through the sardine can that is a concert venue?
This is where the competition with others begins. You and the hundreds or even thousands of other people around you all have the same goal: reach the front barricade. Shoving, pushing, falling, losing your friends, finding your friends and the occasional physical confrontation when you pass by someone that is not happy that you’ve succeeded in getting in front of them.
For all of these reasons and so many more, attending a concert is in fact a sport and should be considered as such. At the end of the day active concert goers like myself really risk our lives at every show we attend.