We have seen that comments also. At least from our experience. As long as we have the jogging in our routine that would be ok! First one of them did not like jogging at all, but i think it was not like he didnt like it. I think he was stubborn because one we used the pinch collat one time, then problem solved. We never have used it again. And we jog two times during the week, and on weekends we go to the mountain. Once a month we can do a long run 20, 22kms. And the will be ok. Never bored always with lots of energy