Sitting in the office all day is bad for you, and leads to muscle wastage, heart disease and reduced life span, but it is easy enough to counteract, according to this article in Lifehacker.com today.
First, get up.
Second, move around.
Maybe take a brisk walk.
The Blog has been in the office all day today, but has fortunately walked around to talk to people, gone downstairs for coffee, trekked down the high street, been in a sit-down-stand-up kind of project meeting, and finally run downstairs to see a colleague's new puppy. Unwittingly, this was heeding the advice of a highly paid professor at a US university who recommends in the article that you "make sure you get out of the office chair throughout the day."