This is a flat out LIE.
It’s not the things that you do or even your age that flare up the pain you are feeling.
It’s what you you do with your body as you go through your recovery (which is so much more than rest).
Take my story as an example.
A few years back, I got an injury which put me in excruciating pain.
The best advice that I was given was that my lower back and hips were fragile and tight and I needed to rest it until the pain went away.