Background
: Increasing the need of appropriate prediction formulas of pulmonary function parameters in Korean adults, interest about which affect the pulmonary function para-meters are increasing. Therefore we examined the relationship between pulmonary function pa-rameters derived from the forced expiratory spirogram and age, height, weight, and smoking amount in Korean middle aged men.

Methods : We analyzed the result of parameters derived from the forced expiratory spiro-gram in 1,954 men who enrolled in health examination of on corporation, from March 1995 to April 1996, who are aged from 45 to 59, and who have neither history of cardiopulmonary dis-ease nor lesions on chest X-ray. Pulmonary function was estimated by SPIROVIT SP-200(Switzerland). We evaluated the relationship between pulmonary function parameters and age, height, weight and smoking amount by multiple linear regression method.

Results : Mean age, height and weight were similar among current-smoker, ex-smoker and non-smoker group. Results of the effect on height-adjusted pulmonary function parameters ac-cording to smoking status were that FVC, FEV₁ and FEV₁/FVC showed no difference among three groups, but FEF 25-75% showed significant decrease in smokers group. To adjust the effects of age, height and weight about pulmonary function, we analyzed the parameters by multiple linear regression method. Results showed that all pulmonary function parameters showed nega-tive correlations with smoking amounts. We evaluated the effect of age, height and weight on pulmonary function parameters by multiple linear regression method. FVC and FEV₁showed negative correlations with age, positive correlations with height and no significant correlations with weight. FEV₁/FVC showed negative correlation only with age, and FEF 25-75% showed signi-ficant negative correlation with age and positive correlation with weight, but no significant cor-relation with height. We compared the predicted value estimated for Korean with that for American. Predicted value from prediction formulas for Korean were higher than that for American.

Conclusion : Smokers had significant decrease of FEF 25-75% compared with ex-smokers and non-smokers in Korean middle aged men. This indicates that smoking develops early changes on peripheral small airways. We have got predicton formulas for pulmonary function parameters in which FVC and FEV₁consisted of age and height and FEF 25-75% consisted of age and weight. Because prediction values estimated by Korean were higher than that by American, we must apply appropriate prediction formulas in Korean to Korean pulmonary function test.

Background
: Most health professionals agree that exercise has positive effect on physical well-being. In addition, they believe that exercise has benefit for improvement of psychologic stress, mood sate, social relationship and sleep disturbance.
The purpose of this study is to evaluate the effect of regular exercise on complaining of somatic symptoms in healthy adults.

Methods : 309 healthy adults were selected among the visitors at hanil health screening center from February 23 to June 23, 1995.
The evaluation was done about the frequency of exercise and somatic symptoms via questionnaire which consisted of 21 symptoms chosen from a list of 35 symptoms of somatization disorder met by DSM-III-R criteria. The 3 categories for exercise were classified as regular, Intermittent and none exercise groups.

Results : Women did lesser regular exercise and had more somatic symptoms than men.
In general population, regular exercise group had significantly lesser somatic symptoms than none and intermittent exercise group, and general, cardiovascular, digestive and musculo-skeletal symptoms showed positive association with regular exercise. In men, regular exercise group was associated with lesser somatic symptoms and only cardiovascular symptoms showed positive association with regular exercise.
But in women, the numbers of somatic symptoms were not significantly different among exercise groups.

Conclusion : In the study of the effect of exercise regularity on somatic symptoms, the numbers of somatic symptom were fewer for the regular exercise group than none an intermittent exercise group in men. Therefore regular exercise helps reduce complaining of somatic symptoms.