Is this appropriate to say to your boss?

I've got a meeting with my boss and HR manager tomorrow due to my job giving me back and shoulder pain.

I'm going through boxes of old files and throwing the paper into a destruction bin. On top of that I'm their relief receptionist so for the last year I was covering for an idiot who was always away once a week.

I told them many times this has been a bit much and all they have said is "This is part of your job"

If they ask me whynI didn't say anything, can I say "I have multiple times, but all you said back was, this is part of your job."

I feel as though they would ask that even though I told them.

The files in the boxes are becoming more heavier and I've been doing this for 1.3 years.

Last week my shoulder and back felt like it was on fire. Monday it went down but now it's come back.

Can they fire me? I can manage it if they stop giving me extra work.

Is this appropriate to say to your boss?
Post Opinion