A friend of mine asked me, what's the best way to strengthen her legs and butt. I answered: "Just do regular squats". However she is not in good shape and is afraid of doing squats because she thinks that it may hurt her knees. However many studies and also many answers on this site suggest that the opposite is true: squats, if done correctly, are good for the knees and for many other things.
Now I am looking for a safe progression (very slowly inclining) to lead her to be able to do full bodyweight squats with perfect form in a few months.
I should add that she is very inflexible in her legs, I am not sure if this might be an issue when developing a good squat form.
So is there any slow progression (i.e. do this exercise the first week, do that exercise the second week...) which
- teaches her "automatically" to do squats in a perfect form at the end
- slowly increases difficulty such that her body adapts to it without problems
- it is "psychologically safe", i.e. that it takes away the fear about hurting the knees by doing squats.