The effect held good when other possible factors, such as alcohol consumption and physical activity, were taken into consideration.

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While no one will dispute the fact that many of our current habits concerning food consumption, physical activity, stress management and sleep deprivation could use some positive invigoration.

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They looked at all kinds of factors that can affect our weight such as TV watching, changes in physical activity levels, smoking and the consumption of all kinds of food and drink.

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Rather, HFCS supporters argue that obesity is as much a function of a corresponding decline in physical activity during the same period that HFCS consumption increased.

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What this is all suggests is that the human spirit in its most daring moments has actually manifested physical attenuations of energy expenditure, reducing the tally of total energy consumption by exponential multiples undreamed of a few generations ago.

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Pediatricians could be focusing on recommending less television viewing, for instance, and more physical activity, as well as advising parents to limit children's consumption of juices and sugar-sweetened beverages.

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They rarely take physical delivery of raw materials and have no effect on the actual production and consumption of metal, grain or oil.

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Researchers say the reason for the surge is partly because Americans are getting older and fatter, and possibly because of the country's decline in physical activity and some undefined changes in the American diet such as an increase in fat consumption.

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Many products and services are created along supply chains that travel from idea conception to final consumption and that include value-added activities of varying degrees of labor-, physical capital-, and intellectual capital-intensity.

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While lower income people probably do spend a larger percentage of their marginal income on consumption in the short run, the income of higher income people usually gets spent, either directly on physical investment or indirectly on investment after financial intermediation.

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