I just read the actual study quoted just to get an idea of what they're claiming, and this further seems to indicate that 'light' labor was anything but... > 4

I just read the actual study quoted just to get an idea of what they're claiming, and this further seems to indicate that 'light' labor was anything but... > 4. The average daily calorie intake of men doing light work was about 600 Cal./day less than that of men doing heavy work. The previous failure to differentiate between intakes was thus not confirmed. The estimated calorie expenditure per minute, excluding what was require for basal metabolism, was on an average 2-2 Cal. for light work, 2-7 for light to medium work, 2.6 for medium to medium heavy work and 3-8 for heavy work. 2.2cal/min would equate to 1320cal additional burned for a 10 hour day! That's clearly far, far above typical calories used in an office job.