Why Is Walking the preferred Type of Exercise? Walking is a low-affect and accessible form of physical activity. People who did simply 30 to 40 minutes of average to vigorous activity had a considerably lower danger of early dying-just like those that had very low amounts of sedentary time, in line with the research. For people who find themselves already extraordinarily active, walking 4 miles in an hour (a few 15-minute mile) is considered a average tempo