I am not remembering anything specifically about polio.
Chunyi would say that when you have a physical issue, practice the Active Exercises of Spring Forest Qigong as long as you can everyday for two to three months. One hour. Two hours. Three hours. Whatever you can find the time to do.
The time spent now in Spring Forest Qigong practice can mean better health and well-being in the long run.
When you have physical symptoms, spend 2/3 to 3/4 of your practice doing the Active Exercises and the balance in Sitting Meditation.
Pete