Walking is part of recommended exercise that one supposed to be engaging in on daily basis. Owing to the reason that it is the simplest of workout that anyone can partake in at any time of the day. And the benefits it has on the body is approximately equal to that of jogging. Long distance trekking is good for the overall functioning of the body as it helps to meet up the daily requirements for exercises. Like you said, you can actually be motivated to trek especially if you have a pet like dog. With the help of a dog you can walk long distance that you couldn't have walked if it was on your own. But the problem we are facing this days is that instead of getting encouraged to trek, we prefer the use of cars. And this means of transportation does not in any way make up for the benefits long distance trekking offers. We should learn to walk instead of driving or taking means of transportations especially if they are those places we can trek to.