| Keywords |
Minute ventilation ; Exercise intensity ; Heart rate ; Oronasal switching point |
| Abstract |
Most recommendations for health concerns against air pollution describe health effects and consequences during air pollutants exposure, and it restricts vigorous outdoor activities. However, it has not been explained how those exposure and activities would actually affect human health and safety. This study aimed a model analysis of air pollutants uptake during exercise, in particular emphasizing exercise intensities. The analysis considered ventilatory responses, air pollutants characteristics and human response, breathing pattern and respiratory response, and finally constructed a model after testing 60 men and women on a treadmill using various exercise intensities. The model describes minute ventilation against exercise intensities as well as against heart rate. Regression analyses revealed that locomotion speed of 5.5 km·hr?1 for men and 6.3 km·hr?1 for women were the oronasal switching point equivalent of ventilatory volume of 35 ml/min, and heart rate of 108 beat·min?1 for men and 131 beat·min-1 for women were the equivalent points. For athletes who were occasionally exposed to air pollutants should be aware of the safety caution of possible mass amount pollutants inhalation. |