@article{ajssm2020825,
author={{Birkenhead, Karen and Barnett, Chris and Solomon, Colin},
title={Using a Standard Respiratory Air Filtering Device during Moderate Intensity Exercise does not Affect Post Exercise Pulmonary Function},
journal={American Journal of Sports Science and Medicine},
volume={8},
number={2},
pages={69--75},
year={2020},
url={http://pubs.sciepub.com/ajssm/8/2/5},
issn={2333-4606},
abstract={Physical exercise requiring oxidative energy transfer increases pulmonary ventilation (V<SUB>E</SUB>). In an air polluted environment, the exercise-induced increase in V<SUB>E</SUB> increases the volume of toxic gases and number of toxic particles to which the pulmonary system is exposed. Using a respiratory air-filtering device (RAFD) during exercise decreases exposure to inhaled toxic gases and particles. However, a RAFD creates external resistance to inspiration and expiration which could decrease pulmonary muscle function and pulmonary volumes, and creates an external mechanical dead-space which produces fractional rebreathing which could increase pulmonary flowrates. This experiment tested the hypotheses that using a RAFD during exercise would; decrease post-exercise peak inspiratory pressure (P<SUB>PI</SUB>) and peak expiratory (P<SUB>PE</SUB>) pressure, FVC and FEV<SUB>1</SUB>, and increase post-exercise flowrates. Using a repeated-measures, counter-balanced design, six healthy moderately aerobically-trained, men (mean ¡À SD; age 24.7 ¡À 1.7 years; peak oxygen utilization [VO<SUB>2peak</SUB>] 42.8 ¡À 5.3 ml kg<SUP>-1</SUP> min<SUP>-1</SUP>) completed two 30 min exercise test sessions at a power output equal to 75% VO<SUB>2peak</SUB>. One session was performed not using (NORAFD), and one using a RAFD (Moldex 8000) fitted with organic vapor cartridges and combined dust and mist pre-filters (inspiratory resistance = 0.216 kPa, expiratory resistance = 0.094 kPa at 85.0 l min<SUP>-1</SUP>). All pulmonary function tests were performed immediately pre-(Pre) and 0 (Post-0), 5 (Post-5), and 15 (Post-15) min post-exercise. There was a significant (p&lt;0.05) main effect of time with an increase in FEV<SUB>1</SUB>, FEV<SUB>1</SUB>/FVC%, PEF, and FEF<SUB>50%</SUB> from Pre to Post-0. There were no other within or between condition differences in any of the pulmonary muscle pressures, volumes or flowrates. It was concluded that using a RAFD during moderate intensity medium duration exercise does not affect post exercise pulmonary function.},
doi={10.12691/ajssm-8-2-5}
publisher={Science and Education Publishing}
}