I have two older people sitting behind me (even older than me!) that cannot get up and down very well, and they are clearly unable to yell and cheer very loudly. I was taught to respect my elders and I try to defer to their view of the game as much as possible.
When I do stand, it is for tremendously important situations. They understand that and have never asked me to sit down. I think they also understand that I am trying my best for them. When I am standing and something good happens (of which I've just blocked their view), they are right there, sitting behind me, smiling with great big smiles, as I high-five them from their seats!
I don't give a shit what anyone says……..those are Bison fans!!