Here is one of the dumbest statements ever written on the subject of fitness.
The needs of an Olympic athlete and our grandparents differ by degree not kind.
This is wrong, wrong, wrong
. If I didn't know better, I'd think a drunken maniac wrote that. Oh wait...
She needs hip flexibility, spinal mobility, and muscle mass. She needs fish oil and probably more protein and iron.
If she can't squat with a bar, don't worry about it. I wouldn't ask her to Zercher, either, if she already has problems with her joints. Get her to goblet squat, and she'll be fine. Work on her rhomboids and hips, and you can fix a lot of postural issues.
3 sets of 10 and a foam roller is your friend here. Constantly varied crap done at high intensity and a puke bucket is not.