Twin study: no effect on weight loss by exercising

x-no-archive: yes

This was true for me, though for some folks the opposite happens...

http://www.medscape.com/viewarticle/509050_print

Susan

Susan wrote:
x-no-archive: yes

This was true for me, though for some folks the opposite happens...

http://www.medscape.com/viewarticle/509050_print

Susan

Can you post the article?

TIA
brigid

x-no-archive: yes

brigid nelson wrote:
Susan wrote:

x-no-archive: yes

This was true for me, though for some folks the opposite happens...

http://www.medscape.com/viewarticle/509050_print

Susan


Can you post the article?

TIA
brigid

I could, but I try to respect copyrights.

There's no charge to register at Medscape, and they have a wonderful
email alert service where you can sign up for every specialty you're
interested in for free, too.

Susan

brigid nelson wrote:
Susan wrote:
x-no-archive: yes

This was true for me, though for some folks the opposite happens...

http://www.medscape.com/viewarticle/509050_print

Susan

Can you post the article?

TIA
brigid

Exercise Has Little Influence on Weight Loss, Cholesterol Level in
Identical Twins


Reuters Health Information 2005. =A9 2005 Reuters Ltd.
Republication or redistribution of Reuters content, including by
framing or similar means, is expressly prohibited without the prior
written consent of Reuters. Reuters shall not be liable for any errors
or delays in the content, or for any actions taken in reliance thereon.
Reuters and the Reuters sphere logo are registered trademarks and
trademarks of the Reuters group of companies around the world.



By David Douglas

NEW YORK (Reuters Health) Jul 26 - Despite "extreme" differences in
exercise levels in pairs of identical twins, lipoprotein and weight
responses to dietary changes are remarkably concordant, researchers
report in the July issue of the American Journal of Clinical Nutrition.

As lead investigator Dr. Paul T. Williams told Reuters Health, "people
respond differently to diet, and one recommendation does not necessary
fit everyone. Our twin study shows that genes largely determine whether
a person can lower LDL-cholesterol ... by lowering their dietary fat."

Dr. Williams of Lawrence Berkeley National Laboratory, California and
colleagues enrolled 28 pairs of male monozygotic twins. In each pair,
one twin ran an average of 50 km per week more than did the other.

In a crossover study, the twins went from a 6-week 40% fat diet to
another 6 weeks of a 20% fat diet. Fat was reduced primarily by
reducing both saturated and polyunsaturated fat from 14% to 4%.
Carbohydrate intake was increased from 45% to 65%.

Despite the twins' difference in physical activity, there were
significantly correlated changes in total cholesterol, LDL cholesterol,
apolipoprotein A-1 and body weight.

Increased dietary fat did not significantly change body weight, say the
researchers. Although there was considerable variability in body
responses, these alterations were significantly correlated within twin
pairs.

"We were able to show the importance of genetics," Dr. Williams
commented, "without having to first identify the specific genes
involved." These data, he concluded, "justify more detailed studies
that look for specific genes using DNA."

Am J Clin Nutr 2005;82:181-187.

*******

Copyrights protect from people duplicating materials for profit
oriented motives. Thsi is for informational purposes only and I do not
stand to profit from doing this.

TC

x-no-archive: yes

wrote:

Copyrights protect from people duplicating materials for profit
oriented motives. Thsi is for informational purposes only and I do not
stand to profit from doing this.

TC


Copyrights give the author rights over redistribution of work product.

You choose not to honor the author's rights, and I try to, though
sometimes I've forgotten.

Susan

x-no-archive: yes

RoT wrote:
Susan wrote


x-no-archive: yes

This was true for me, though for some folks the opposite happens...

http://www.medscape.com/viewarticle/509050_print

Susan


and in a new study:

Smoking proven to be good for you!

:P


You didn't bother to read it, didja? It wasn't anti exercise; it was
about genetics.

Susan

wrote in message
oups.com...


The researcher's conclusions may be right in suggesting that lipid test
results may be largely founded in genetic predisposition. However, my
impression is that they are asking the wrong questions, or posing the wrong
hypotheses.

This obsession with cholesterol is wasting resources.

Hi Susan --

What is true for you? That you tend to stay the same weight regardless
of exercise and diet? I was frustrated by the wording of the article,
but I'd like to understand its meaning better. I read it 3 times.

The way I'm interpretting it is: if you have a certain genetic makeup
you will lose more weight from exercise and diet, otherwise you will
enjoy the effects of exercise and diet to a lesser degree.

That's not exactly the interpretation you got, based on your subject
line, though, right? Your interpretation is that diet has more effect
on weight than exercise for certain individuals? Are they mostly
talking about cholesterol though, and not body fat/weight? I thought
the article was frustratingly vague about its point and the takeaway
message.

x-no-archive: yes

wrote:
Hi Susan --

What is true for you? That you tend to stay the same weight regardless
of exercise and diet? I was frustrated by the wording of the article,
but I'd like to understand its meaning better. I read it 3 times.

You can follow the link to the full text of the article; that may help.

What was true for me was that I was in rehab and the gym steadily for
almost 3 years and low carbing without weight improvements. All my
lipid improvements came with the diet, were not improved by exercise.

I may be that particular genotype. The study was too small and too
short to make conclusions; it opened an area of inquiry, IMO, that
should be followed up with more identicals over years, not weeks. Maybe
they are doing that with that same group.


The way I'm interpretting it is: if you have a certain genetic makeup
you will lose more weight from exercise and diet, otherwise you will
enjoy the effects of exercise and diet to a lesser degree.


I don't think enjoyment was measured, here. :-)

That's not exactly the interpretation you got, based on your subject
line, though, right? Your interpretation is that diet has more effect
on weight than exercise for certain individuals? Are they mostly
talking about cholesterol though, and not body fat/weight? I thought
the article was frustratingly vague about its point and the takeaway
message.


My interpretation was that in those with a particular genotype, diet,
not exercise *may* be determinant and that this finding required
replicastion and validation through more study.

Susan

Cubit wrote:
:: wrote in message
:: oups.com...
::
::
:: The researcher's conclusions may be right in suggesting that lipid
:: test results may be largely founded in genetic predisposition.
:: However, my impression is that they are asking the wrong questions,
:: or posing the wrong hypotheses.
::
:: This obsession with cholesterol is wasting resources.

Agreed.