Limitations of the study
asthma
HEART DISEASES, ASTHMA, HIGH BLOOD PRESSURE
Due to the fact that exercise tests were carried out in air-conditioned laboratory rooms, effects of differing environmental conditions (e.g. temperature, humidity) on physiological parameters and the microclimate behind the mask could not be considered. Although some subjects with mild asthma and high blood pressure took part in the study, no statements can be made about subjects with more severe chronic lung or heart diseases