I think the appeal of a treadmill desk is mostly avoiding sitting or just-standing at a desk, both of which have been shown to do damage to a body. It seems like the article kind of indicates to me that the ultimately the damage might be neither sitting nor standing nor walking but simply being absorbed in the computer while you let your body deteriorate.
From what I've read, exercising before or after work does NOT negate the negative health effects of sitting all day. It helps, but continuous sitting is still just terrible for us.
Care to expand? I thought the relationship between poor health outcomes and sitting was a correlation requiring further study to demonstrate causation? Interested to read any research that says otherwise
I don't remember coming across any research proving causation over correlation.
From a quick Google search, there are a couple news articles (with direct links to the journal articles) about extra-curricular exercise not removing harms (which is all I meant to note in my OP):
