SPORTS MEDICINE : MEDICAL: CONDITIONS: OBESITY : HISTORY: 1980'S : RESEARCH: Millennials Need to Eat Less and Exercise More to Prevent Obesity

David P. Dillard
 

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SPORTS MEDICINE :

MEDICAL: CONDITIONS: OBESITY :

HISTORY: 1980'S :

RESEARCH:

Millennials Need to Eat Less and Exercise More to Prevent Obesity

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Millennials Need to Eat Less and Exercise More to Prevent Obesity

Published on September 22, 2015 at 5:46 AM

News Medical

http://www.news-medical.net/news/20150922/ Millennials-need-to-eat-less-and-exercise-more-to-prevent-obesity.aspx

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A shorter URL for the above link:

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http://tinyurl.com/p2a4nlk

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If you are struggling with weight gain, you might be surprised to know that your parents had it easier - they could eat more and exercise less, and still avoid obesity, according to a recent study out of York University's Faculty of Health.

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"Our study results suggest that if you are 25, you'd have to eat even less and exercise more than those older, to prevent gaining weight," says Professor Jennifer Kuk in the School of Kinesiology and Health Science. "However, it also indicates there may be other specific changes contributing to the rise in obesity beyond just diet and exercise."

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The study, funded by the Canadian Institutes of Health Research, analyzed dietary data of nearly 36,400 American adults collected by the National Health and Nutrition Survey between 1971 and 2008. The available physical activity frequency data, of 14,419 adults in the 1988 to 2006 period was also used.

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snip

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The study, "Secular differences in the association between caloric intake, macronutrient intake and physical activity with obesity," is featured in the upcoming issue of Obesity Research & Clinical Practice.

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The researchers point out that although several studies have shown that eating less and exercising more results in weight loss, in the long term, they are proven to be ineffective.

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"This is because weight management is actually much more complex than just 'energy in' versus 'energy out'," says Kuk. "That's similar to saying your investment account balance is simply your deposits subtracting your withdrawals and not accounting for all the other things that affect your balance like stock market fluctuations, bank fees or currency exchange rates."

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The complete article may be read at the URL above.

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Obes Res Clin Pract. 2015 Sep 14. pii: S1871-403X(15)00121-0. doi: 10.1016/j.orcp.2015.08.007. [Epub ahead of print]

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Secular differences in the association between caloric intake, macronutrient intake, and physical activity with obesity.

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Brown RE1, Sharma AM2, Ardern CI1, Mirdamadi P1, Mirdamadi P1, Kuk JL3.

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BACKGROUND:

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To determine whether the relationship between caloric intake, macronutrient intake, and physical activity with obesity has changed over time.

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METHODS:

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Dietary data from 36,377 U.S. adults from the National Health and Nutrition Survey (NHANES) between 1971 and 2008 was used. Physical activity frequency data was only available in 14,419 adults between 1988 and 2006. Generalised linear models were used to examine if the association between total caloric intake, percent dietary macronutrient intake and physical activity with body mass index (BMI) was different over time.

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RESULTS:

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Between 1971 and 2008, BMI, total caloric intake and carbohydrate intake increased 10-14%, and fat and protein intake decreased 5-9%. Between 1988 and 2006, frequency of leisure time physical activity increased 47-120%. However, for a given amount of caloric intake, macronutrient intake or leisure time physical activity, the predicted BMI was up to 2.3kg/m2 higher in 2006 that in 1988 in the mutually adjusted model (P<0.05).

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CONCLUSIONS:

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Factors other than diet and physical activity may be contributing to the increase in BMI over time. Further research is necessary to identify these factors and to determine the mechanisms through which they affect body weight.

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KEYWORDS:

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Body mass index; Energy intake; Epidemiology; Etiology; NHANES

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PMID:
26383959

[PubMed - as supplied by publisher]

http://www.ncbi.nlm.nih.gov/pubmed/26383959


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