Why Is Walking the most well-liked Type of Exercise? Walking is a low-impact and accessible type of physical exercise. People who did just 30 to 40 minutes of average to vigorous exercise had a substantially lower threat of early death-just like those who had very low amounts of sedentary time, according to the study. For people who find themselves already extraordinarily lively, strolling 4 miles in an hour (about a 15-minute mile) is taken into account a reasonable tempo