Even with that in mind, though, I see no reason to reject the 10,000 step rule. Unlike the bad advice on carbs which lead to unstable blood sugars and encourage over eating, the 10,000 step rule doesn’t harm you. It gives you a target that can be achieved with not too much effort even if you have a desk job. Taking a walk at lunch to the Fed and back gets me over half the steps I need. It also resets me for the second half of the work day and gets me a small amount of sun. A little vitamin D creation never hurt anyone after all.