A dose-response relationship between types of physical activity and distress.

This study aimed to examine whether a dose-response relationship exists between psychological distress and types of physical activity (total, occupational, and leisure-time). The study subjects (233 men and 313 women) were recruited for a study on cardiovascular disease in the Yangpyeong community located in South Korea. The type and characteristics of physical activity were measured with a modified version of the Stanford 5 city project's questionnaire by well-trained interviewers using a standard protocol.