Most research on physical activity and colon cancer has focused on occupational physical activity in men. Clearly, men with sedentary jobs have increased risk of colon cancer (Sternfeld, 1992). One of the most comprehensive studies that included women was a case- control study of Utah residents that took into account differences in dietary patterns and body weight, confounding factors not usually controlled (Slattery et al., 1988). Comparing both occupational and leisuretime activities, the sedentary individuals of both sexes were at nearly two-fold increased risk for colon cancer
