Chunyi Lin says that if you want to see a significant improvement in your physical condition, practice Spring Forest Qigong, Level 1, for 1 to 2 hours a day over 2 to 3 months.
Some people will see significant improvement instantly--within minutes of beginning their first practice.
Some people will see significant improvement over the first couple of weeks.
Others will have to practice three solid months.
And everything in between.
Everyone is different. Everyone will experience varying results. But what remains constant is that 1) physical problems result from energy blockages and 2) practicing Qigong can release those blockages and balance the energy allowing your body to heal itself.
It really is that simple.
(Do not change any medial treatment you are taking without telling your doctor.)