Hello everyone, I'm sorry to see the post has caused such a stir - this absolutely wasn't our intention and, as the introduction indicates, it was written by an expert in the field so we put our trust in a published academic's research.
As the introduction states, these are tips as to what could make a difference later in life - none are harmful, but might well make a difference later down the line. In terms of the ballroom dancing point, from what I gather it's thought that the act of remembering the steps and responding to a partner's movements can help to postpone some dementia symptoms. I believe this is all based on research done at the University of Stirling by June and her colleagues.