Do various types of physical activity affect breast cancer risk differently?
It appears that the total amount of physical activity is more important than the type of activity for breast cancer risk reduction. Studies have examined physical activity at work, leisure physical activity, and total physical activity. Lower breast cancer risk has been reported for all these types of physical activity. Nonetheless, studies of total physical activity have been most consistent in demonstrating an association with lower breast cancer risk. This consistency of the results strongly suggests that that total activity is most important. Is the frequency of the physical activity important for reduced breast cancer risk? Many studies have shown a dose-response relationship between the frequency (i.e. how many times per week physical activity was performed) of physical activity and decreased breast cancer risk. In other words, the more frequently women were physically active, the greater was the decrease in their breast cancer risk. It supports the concept that how often women a
