Figure 2: Fitness testing and maximal METs attained during the Modified Balke treadmill test across five physical activity categories. Mean and 95% CI of the mean using least squares mean. Model was adjusted for by age, smoking status, history of heart attack, history of stroke, history of hypertension, and history of diabetes. Physical activity categories represent (1= 0 MET-minutes; 2= 1-499 MET-minutes; 3= 500-999 MET-minutes; 4= 1000-1499 MET-minutes; 5= MET-minutes or greater).