This study is a prospective randomized crossover study to evaluate the effects of two different manipulation techniques on pulmonary function parameters in persons with COPD. Thirty-six (36) subjects will be enrolled in the study in order to complete the study with at least 30 subjects. Pulmonary function measures will include spirometry and lung volume. The pulmonary function testing will be done baseline, 30 minutes post-treatment, and 3 hours post-treatment. The study protocol treatment consists of a five-minute treatment session of one of the two studied treatment techniques given in a random order. After a washout period of at least four weeks, the subject will return for a second treatment session using the other technique.