I think this is confounding the two points. I don't think GP was talking about "exercise per day" but rather long periods of time of sedentarism. The quote from

I think this is confounding the two points. I don't think GP was talking about "exercise per day" but rather long periods of time of sedentarism. The quote from the article doesn't at all dispute the proposed point that "standing still for a long period of time can also be harmful"