My main yoga teacher also has a degree in yoga therapy.
I had had some problems with planter fasciitis (I never can remember how to spell it and didn’t know the word until recelntly–just that my foot hurt like %$@*! most of the time).
For a couple of years the pain in my foot would come and go, and often I would feel pain every time I took a step, and was considering buying special shoes and/or finding a doctor who could help.
But when I shared the problem with my new (at the time) yoga teacher, she said I should consider doing a private class with her and she would give me exercises that would help.
I was skeptical and didn’t want to spend the extra money, but did it anyway. She gave me several exercises to do that started to work right away, and now three months later, I’m 99% pain free in my foot, though I have to make sure I continue doing the exercises, which don’t take that much time–a few minutes at a time two or three times a day.
So I’m very much sold on yoga therapy and private lessons.
In subsequent lessons she helped me with my posture, how to walk properly (I had been locking my knees unknowingly), how to do headstands and other postures better, how to work on my abdominals, which because of some weakness were throwing some of my poses out of kilter.
Though I have learned much from regular classes, I see a tremendous value in one-on-one instruction, and I have found it to be well worth the time and expense.