Comprehensive directed breathing retraining improves exertional dyspnea for men with spirometry within normal limits.
Am J Phys Med Rehabil. 2010 Feb;89(2):90-8. doi: 10.1097/PHM.0b013e3181bc0cf4.
Am J Phys Med Rehabil. 2010.
PMID: 19789433
Clinical Trial.