Re: Energy expenditure in the weight loss in obese women on low-fat and low-carbohydrate diets

Jefferson <fwroy@xxxxxxxxxxxxxxxxxxxx> wrote:
Hi Gys:
http://jcem.endojournals.org/cgi/reprint/90/3/1475

The full article is also available as an html document -
http://jcem.endojournals.org/cgi/content/full/90/3/1475


J Clin Endocrinol Metab. 2005 Mar;90(3):1475-82. Epub 2004 Dec 14.
The role of energy expenditure in the differential weight loss in obese
women on low-fat and low-carbohydrate diets.

(snipped)
Gys
Note that this study used indirect calorimetry. Exercise levels in both
groups were comparable while the low-fat groups calorie intake was
slightly higher.

The slopes in FIG. 3. of the 2 groups in this study is interesting. The
subject on the low-carbohydrate group were losing weight at an
increasing rate even at the end of the study whereas the low-fat group
was losing weight at a more constant but slower rate.

The graph in fig 3 there doesn't show the data between weeks 8 and 16,
so we can't see if the rate of increase is levelling off. It looks as
though after 16 weeks the effect is probably still steadily
increasing.

I can't remember where, but I've seen this effect of continuing
adaptation giving continually improving results to a low carb diet
over a period of months in graphs in some other studies too. Can
anyone remember?

I also recall that some of the beneficial effects of the diet I ended
up with after being diagnosed didn't start showing up until I'd been
on the diet for at least six months. Some of these long-developing
effects could simply be the result of increasing weight
loss. Feinman's model suggests other reasons, and others have
suggested that changes in gut flora that take many months to happen
can have important effects.

It looks as though these kind of diet comparisons should be at least
some months long in adherence to one specific diet.

--
Chris Malcolm cam@xxxxxxxxxxxxxxxxxxxx DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]

.

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