Why does it start to hurt when i sit up straight for a long time?

Question

I hate that i slouch, but every time i try sitting up straight, my back starts hurting, how can i get it to stop?

Answer 1

It's because you're not used to sitting up straight.  I don't know how to make it stop, the only thing I can say is just grit your teeth and bear it, it will be way better for your back in the ong run.