In this paper, we studied prepubescent boys (N = 75; 11.3 years ± 2 months) divided into three groups: two experimental groups and age-paired, non-systematically physically engaged controls (N = 25). The experimental groups consisted of 27 basketball players, and of 23 dinghy sailors. The pulmonary function was established measuring the large airway variables (inspiratory-vital-capacity, forced-vital-capacity, one-second-forced-expiratory-volume) and small airway variables (peak-expiratory-flow, and maximal-expiratory-flow after 50% and 75% exhalation). All variables were measured in absolute values and then presented and compared in relative values - predicted for age and stature. Using the simple originally constructed questionnaire, passive smoking status was observed, and the subjects were additionally sub-sampled as passive smokers, or non-exposed to passive smoking. The multivariate- analysis-of-the-variance (MANOVA) showed significant dominance (p

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