Performance, acute health symptoms and physiological responses during exposure to high air temperature and carbon dioxide concentration
Abstract Human subjects were exposed for 3?h in a climate chamber to the air temperature of 35?°C that is an action level, at which the working time needs to be diminished in China. The purpose was to put this action level to test by measuring physiological responses, subjective ratings and cognitive performance, and compare them with responses at temperature of 26?°C (reference exposure). Moreover, CO 2 was increased to 3000?ppm (CO 2 exposure) at 35?°C to further examine, whether this change will have any effect on the measured responses. Compared with the reference exposure, exposure to 35?°C caused subjects to report feeling uncomfortably warm, to rate the air quality as worse, to report increased sleepiness and higher intensity of several acute health symptoms. Eardrum temperature, skin temperature, heart rate and body weight loss all increased significantly at this exposure, arterial oxygen saturation decreased significantly, while the percentage of adjacent inter-beat cardiac intervals differing by?>?50?m (pNN50) decreased significantly, indicating elevated stress. The performance of addition and subtraction tasks decreased significantly during this exposure, as well. Increasing CO 2 to 3000?ppm?at 35?°C caused no significant changes in responses. Present results reaffirm the selection of 35?°C as an action level, and show that concurrently occurring high CO 2 levels should not exacerbate the hazards. Highlights Subjects were exposed in a chamber for 3?h at elevated temperature and CO 2 . Physiological and subjective responses and cognitive performance were examined. Exposure to 35?°C increased health symptoms and discomfort and reduced performance. 3000?ppm CO 2 at 35?°C did not exacerbate the negative effects of high temperature. The results provide useful basis for protection of workers at high temperatures.
- 원문이 없습니다.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기