I was flicking through the February edition of Runner's World Mag and saw a section in 'Runners' Resolutions' to 'get off your glutes.'
It says that 'a study published in the British Journal of Sports Medicine concluded that every hour of TV watched after the age of 25 reduces the viewers's life expectancy by 21.8 minutes. Sitting is also making you a weaker, less flexible and more injury-prone runner.'
They do say that going for a walk every half hour or so is best for you but that standing desks 'might be the next big thing.'
I would suggest that adjustable height desks in conjunction with the Back App chair are a realistic way forward. The Back App provides some movement while you are seated, is very comfortable and also as you sit a little higher and it is easier to get up from sitting on a Back App then you are much more likely to do so.