And earlier this year the evidence against many hours of sitting expanded further: The American Journal of Epidemiology published a study finding that those who work a sedentary job have almost twice the risk of a specific type of colon cancer.

CNN: Sitting for hours can shave years off life

In both cases, the more sedentary job carried greater health risks than the more active job, even though they were in a similar line of work.

CNN: Sitting for hours can shave years off life