Is there a good way to help someone not overwork themself?

So, my mom tends to overwork herself. She has it in her head that she doesn’t deserve a break. I just want to know what I can do to help her. In any way. It’s just heartbreaking seeing her do this to herself. She even has a busted knee! This lady just don’t stop. I just, want to know what I can do, if there is something I can do.