Those are all good things. There are additional benefits to getting more or different exercise. But the point remains that walking is real exercise, it's more t

Those are all good things. There are additional benefits to getting more or different exercise. But the point remains that walking is real exercise, it's more than most people get, and dismissing it as "not real" is privileged gym-rat bullshit. Even your own citation emphasizes aerobic activity - leading with moderate aerobic activity such as walking - over strengthening exercises. You yourself have said in another comment: > There are enormous health benefits to be had by small incremental increases Yes incremental. The more people pile on about doing even more before it "counts" as "real exercise" the fewer people will do even the first part. Not everyone is in their twenties, or built exercise into their lifestyle when they were. I myself started a bit late, and it's only because I'm more stubborn than most that I've kept progressing. People need encouragement, goals they can meet and victories they can savor, not "everyone should exercise the way I do" from people in more favorable circumstances. Ten people sticking with a modest exercise program is better than one person sticking with a more aggressive one, as far as public health is concerned.