Team McCallum

R&D for Lifetime of Life

Fast food feast.

In Jan 2009, BBC’s Horizon series (Why Aren’t Thin People Fat?) got a small number of thin volunteers to vastly over-eat and be inactive for a while to see what happened. The programme didn’t look at what happened when the people went back to normal habits.

Åsa Ernersson and team reported on a similar experiment in Sweden, this time with a follow-up at 12 months and two and a half years.

Volunteers with a normal BMI were asked to double their energy intake by eating at least 2 fast food meals per day and restricting activity to what is considered sedentary (under 5,000 steps/day) for 4 weeks.

If they couldn’t hack fast food, they were to bump up intake on high protein and high saturated fat. In reality, the group achieved a 70% increase in energy intake.

The pounds piled on, more so in men than women, and more so around the abdomen (“bad” fat) than other regions (“good” fat).

At 6 months, only a third had got back to their start weight. The excess was fat, with no increase in lean tissue. At 12 months the results were much the same.

At two and a half years, both men and women had increased weight and were now again nearing the weight reached at the end of the overfeeding/undereating period. Whereas matched controls showed no increase at all.


August 25, 2010 - Posted by | Activity, Åsa Ernersson, Bodyfat%, Diet, Exercise, Gender, Health, Success, Weight management

1 Comment »

  1. of course when you dont have time to cook, fastfoods would always be the best option ‘;,

    Comment by Chinese Girls | December 2, 2010 | Reply

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