Q: what is the benefit of slow long distance walk

A: Slow long walks do not have particular benfit when compared to a more brisk walk or run for somebody who can do either. But they may be very appropriate for older people, those in subpar physical condition who is just starting out on exercising, and those who are rehabilitating from an injury. They can also have great calming psychological effects which may be missing from more intense forms of exercise. Finally, they are MUCH MUCH better than no exercise at all. But if you are thinking in terms of a slow walk burning more fat than a run over the same distance, then that's not the case -- amount of calories burned is proportional to distance, not to time and a faster run will give your cardiovascular system more of a workout.