Abstract
In this study, we investigated the emission time of exhaled smoke post cigarette smoking in four situations: rest, drinking water, read-ing aloud, and exercise. No significant differences in emission time were observed for the other three situations, but the exhaled smoke’s emission time for exercise was significantly shortened compared to those for rest and reading aloud. Heating-type cigarettes tended to have a shorter emission time at rest than paper-based cigarettes, but heating-type cigarettes were shown to also involve the emission of exhaled smoke. It was found that the length of smoking history and the number of cigarettes smoked per day were unrelat-ed to the emission time. These results suggest the effectivity of exercise in reducing exhaled smoke; they also suggest that heating-type cigarettes should be regulated similar to paper-based cigarettes.

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