Prolonged sitting is associated with a numerous health concerns such as obesity, increased blood pressure, high blood sugar, and unhealthy cholesterol level. These health hazards persist even with regular exercise. Doctors advise all adults to sit less and move more to counter the effects of sitting. A recent study by Columbia University exercise physiologists suggests that just five minutes of walking every half an hour is the optimum frequency and duration. The group, led by Keith Diaz, PhD, associate professor of behavioral medicine at Columbia University Vagelos College of Physicians and Surgeons, compared five activity options, one minute of walking after every 30 minutes of sitting, one minute after 60 minutes; five minutes every 30; five minutes every 60; and no walking, and presented their conclusion. Diaz suggests that for optimal health regular movement at work is necessary along with regular exercise. Small amount of walking throughout the day can significantly reduce the risk of heart ailments and chronic diseases.