it seems to me in countries where people are living long, that in addition to good healthcare, they are really active!
I have been to a few of the Scandanavian countries and seen octogenarians riding bikes up hills through town, toting snow shoes and skis and so on. I hardly think they are slaving at the gym, but they are active and mobile.

While not a fan of running on a hamster wheel, I think resistance training, some moderate cardio, and streching are really important. I get my heart rate up by moving from set to set with weights quickly. I know there is lot of debate about whether exercise is good for weight loss, but shouldnt we be most concerned about the impact on our health?