A study finds that the relative risk for the association between physical activity and heart disease is a 1.37. What does this mean? 0 Physical activity increases risk of heart disease by 137%. 0 Physical activity increases the risk of heart disease by 37%. O Physical activity reduces risk of heart disease by 37%. O Physical activity reduces risk of heart disease by 137%. The following table shows the relative risks of depression for women who walk at an easy pace for different amounts of time each day. What is the unadjusted relative risk of depression in women who walk Z40 minutes/day, as compared to women who walk