Why Is Walking the most popular Form of Exercise? Walking is a low-impact and accessible type of physical activity. People who did simply 30 to forty minutes of moderate to vigorous activity had a substantially decrease threat of early loss of life-much like those that had very low quantities of sedentary time, in keeping with the study. For people who find themselves already extremely lively, strolling 4 miles in an hour (a few 15-minute mile) is considered a reasonable pace