So my mom said my joints hurt because I don’t move enough.

I stretched and my shoulder did a popping thing and it hurt so I said “ouch”, and my mom said “It’s because you don’t move enough”. For reference, I am on 2 ski teams and am more active than most people despite my disability. SomI had the audacity to say she is wrong and she said that watches plenty of people on facebook who have EDS and she knows it’s because I don’t move enough. I know that exercise is important in keeping your joints in place but I’m right that that was wrong and rude, right?