Fast food's high capacity of work d...

Fast food's high capacity of work density, good taste, high fat peace low fiber content, and high contentment of refined starches and sugars all contribute to weight gain. Despite regular fast feed consumption, however, not all adolescents gain weight. Ebbeling and colleagues hypothesized that lean adolescents who regularly vanish out of being fast food eat less afterward than overweight adolescents.

To trial this hypothesis, the authors recruited 54 lean and overweight adolescents 13 to 17 years of age for brace studies. The first study took place in an observational setting to determine fast nutrition consumption as it might come to one's mind in real life. The inferior study compared energy intake forward the days fast food was consum with intake onward the days it was not consumed

In the first meditation the enrollees were fed a fast bread meal at a national fast bread chain restaurant. Participants were assemblageed by sex and weight and were given as a great deal of as they liked of standard weight servings, with refills supplied immediately as destitutioned After finishing the meal, participants were asked to estimate the size of their meal onward a visual analogue scale, while each person's actual consumption was measured, with gram weight transposeed to energy units.

In the other study, 51 adolescents from the first inquiry were interviewed on two fast aliment days (defined as eating from united of five fast food chains and including common meat item) and two non-fast fodder days and were asked to recall their commons intake and physical exercise forward that day.

In the "natural" fast fodder eating session, overweight participants ate more than lean participants in absolute limits and relative to the individual's daily potency requirements. In the second studious mood overweight participants ate 409 kcal by day more on fast nutrition days than on non-fast regimen days, whereas the lean participants ate the same amount as always in succession days they ate fast food

Assuming an average potency consumption of about 790 kcal for meal to maintain energy requirements, enrollee greatly over-ate at their trial fast aliment meal, consuming about 1,652 kcal, or brace thirds of the daily efficiency requirement. Overweight teens ate more than their lean counterparts and consum more overall forward fast food days than non-fast sustenance days, compared with lean participants, who ate the same amounts whether it was a fast subsistence day or not.

The authors judge that the lean participants ate les at other meals forward days they ate fast aliment meals, while the overweight participants did not compensate at other meals by the agency of eating less. It is not clear whether the failure to compensate in the overweight cluster is a primary cause of obesity related to a genetic propensity or if it originates secondarily from being overweight. It also was set up that overweight teens underreported the amount that they ate compared with lean adolescents.

CAROLINE WELLBERY, MD

Ebbeling CB et al. Compensation for activity intake from fast food among overweight and lean adolescents. JAMA June 16 2004;291:2828-33

COPYRIGHT 2005 American Academy of Family Physicians

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