This term is a pain associated with the sciatic nerve, which runs from the lower back into the legs. The most common causes of sciatica are a herniated disk or a bone spur pressing on the nerve.
As was just mentioned, yoga helps to strengthen the muscles in both the back and the legs, which could ultimately lower the amount of pain one feels due to this pinched nerve.
Bronchitis is caused by inflammation of the bronchial tubes, which is what carries oxygen to the lungs. When the condition becomes chronic, it means that the swelling has lasted a significant amount of time.
Yoga helps to aerate the lungs as well as helps to lower inflammation found throughout the body. The key here is to find exercises that elevate respiration, but that also increases oxygen levels in the body; yoga can do both things.