"In a British study published in 1953, scientists examined two groups of workers: bus drivers and trolley conductors. At first glance, the two occupations appeared to be pretty similar. But while the bus drivers were more likely to sit down for their entire day, the trolley conductors were running up and down the stairs and aisles of the double-decker trolleys. As it turned out, the bus drivers were nearly twice as likely to die of heart disease as the conductors were.
A more recent interpretation of that study, published in 2004, found that none of the participants ever exercised. But the two groups did sit for different amounts of time. The analysis revealed that even after the scientists accounted for differences in waist size—an indicator of belly fat—the bus drivers were still more likely to die before the conductors did."
This looks like the Morris studies referenced in TRF [2] and BCMJ [3].
"In a British study published in 1953, scientists examined two groups of workers: bus drivers and trolley conductors. At first glance, the two occupations appeared to be pretty similar. But while the bus drivers were more likely to sit down for their entire day, the trolley conductors were running up and down the stairs and aisles of the double-decker trolleys. As it turned out, the bus drivers were nearly twice as likely to die of heart disease as the conductors were.
A more recent interpretation of that study, published in 2004, found that none of the participants ever exercised. But the two groups did sit for different amounts of time. The analysis revealed that even after the scientists accounted for differences in waist size—an indicator of belly fat—the bus drivers were still more likely to die before the conductors did."
This looks like the Morris studies referenced in TRF [2] and BCMJ [3].
[1]: http://my.menshealth.com/exclusive-content/sentenced-chair
[2]: http://www.abdn.ac.uk/iprc/documents/bus_driver_wellbeing.pd...
[3]: http://www.bcmj.org/article/exercise-and-heart-review-early-...