There is another group of conditions in which the bronchial tubes are obstructed and the patient cannot breathe properly. The two main forms are chronic bronchitis (long term inflammation of the bronchial tubes), and emphysema (excessive dilation of the air sacs due to damage to their walls). These two conditions are a real problem, because such patients usually continue to deteriorate despite the best treatment medical science can offer. In 1978, Dr. M. K. Tandon published in the journal Thorax an account of his work with twenty two elderly patients with severe cases of these conditions. Half of these people were given routine physiotherapy treatment, and the other half received yoga training. Tandon found that, "At the end of the nine months the yoga trained subjects reported to have:
1. Improved exercise tolerance.
2. Quicker recovery after exertion.
3. Control over an attack of shortness of breath without the need of medical help.
4. Definite improvement in their overall chest condition.
The breathing pattern of the yoga trained group was changed to a more efficient one. It was deeper and slower as compared with their original condition before the experiment and as compared with the shallow fast breathing of the physiotherapy group which showed no improvement in the breathing pattern."
We must remember too that these are severe diseases in elderly people who, under ordinary conditions, would have deteriorated during the nine months of the investigation, rather than improving as well as they did with yoga.
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