Sorry again for the lack of updates – the thesis is finally
done! I graduate on Sunday! If all goes
as planned I will have a baby in 7-12 weeks! (Holy shit, how did that happen?)
So yeah, there has been a lot going on.
But before I catch you up on that stuff, I wanted to take a
moment to reply to some great comments I got on the last post.
Lou de B made some great critiques that I would love to
address. Here is Lou’s comment, reposted
for archival purposes:
Ok, but here is the
thing. First the disclaimer: I am a linguist, not a medical Dr. I am overweight
so this is not a thin person ranting at fat person thing. I have a long line of
short tubbies above me on my Mum's side. But...
you cannot deny that
obesity is a bigGER problem in the US, Aust etc than in - say - I dunno,
Siberia. And that we just happen to be those that eat HUGE servings and a load
of crap. In the US (I've been a dozen times or so) I have so much trouble
remembering to ask for small everything so I get something equal to large in
Aust. I am not kidding. Some of those coffee or drink cups are buckets. Not
cups.
IF people are not
drinking gallons of sugar etc AND they are still overweight, then sure, they
can be healthy. I bushwalk, climb, canyon etc as do many friends who are
overweight and fit. But if I'm drinking gallons of soft drink (you call soda)
then my Dr should tell me to stop it. It isn't good for my health. Or my joints
(which is where I'm having trouble).
This is not to deny other
issues. I read The Beauty Myth at Uni and Real Gorgeous by Kaz Cooke etc. I'm
very aware of the role of the media to distort images etc. But being overweight
DOES lead to an increase in some conditions AND we did not evolve joints etc to
be that size.
Feel free to rip all
this apart. I know you know more than me!! And I ought, I guess, just read your
thesis when it's done.
So let’s break this down point by point (mostly because my
brain used up all its transition sentences over the past 9 months).
1. Obesity is more
prevalent in the US and Australia than in places like Siberia.
This is absolutely true.
According to data collected from 1994 to 2002, the prevalence of obesity
(BMI >30) in the US is 27.6% for men and 33.2% for women (Baskin et al 2005,
"Prevalence of obesity in the United States"). According to a 2005
paper (Thorburn, "Prevalence of obesity in Australia") the prevalence
of obesity in Australia is 19% for men and 22% for women. I could not find data
for Siberia specifically, but in Russia as a whole, in 2000 the prevalence of adult
obesity was 16% (Jahns, Barturin, & Popkin, “Obesity, diet, and poverty:
trends in the Russian transition to market economy”).
2. The places where
obesity is more prevalent have larger serving sizes and more junk food and
soda.
I can’t find any articles to specifically support this, but
based on my personal experience alone, I agree.
(I know that is really flimsy, but stick with me, I will do more
research on this in the future.)
That being said, the implication here is that the larger
serving sizes are responsible for the increased prevalence of obesity in the
US. There are a ton of differences
between the US and Russia – we could really pick any of them and make an
argument. For example, it is colder in
Russia than it is in the US.
Thermogenesis burns calories.
Therefore, the temperature difference could be responsible for the difference
in obesity prevalence. I’m not saying I
believe this to be true, I am just saying that the causes of obesity are very
complex and singling out any one thing is unlikely to be instructive.
3. It is possible to
be fat and fit.
Yes, yes, a million times yes. This is one of the concepts that a lot of
people have trouble accepting, because we have been so conditioned to believe
that fat = unhealthy. Here is one of my
favorite graphs that I found in my research (Matheson et al, 2012 “Healthy
Lifestyle Habits and Mortality in Overweight and Obese Individuals”):
This study looked at four different healthy habits – eating 5
fruits and vegetables a day, getting moderate exercise, not smoking, and
drinking in moderation. Researchers
grouped people according to how many of these healthy habits people had adopted
(0 – 4 on the X axis) and then further divided people based on BMI (normal
weight, overweight, or obese). On the Y
axis, you have mortality hazard ratio – the risk that someone will die
prematurely compared to a thin person with all four healthy habits.
So, for people who have none of these healthy habits, we see
that BMI matters – those in the obese category are 7 times more likely to die
than thin folks with all four healthy habits, while those in the normal weight
category are only twice as likely to die.
However, as people adopt more healthy habits, the difference between the
normal weight and obese groups disappears.
Remember, these people are not losing weight as they adopt
the healthy habits, because they are still in the obese category. Just having the healthy habits is enough to
change their mortality risk, independent of weight loss.
I would also like you to look closely at the middle bar of
each group – the overweight category. As
soon as overweight people have just one healthy habit, their mortality risk is
actually lower than normal weight people. (This is a whole separate rant for another
day).
4. Some fat people
are not fit – they have poor health habits such as drinking soda.
This is absolutely true.
There are also thin people who drink a lot of soda. This is a poor health choice in either group.
5. Doctors should
tell fat people with poor habits to improve their habits for the sake of their
health.
Yes, I agree. Doctors
should tell their fat patients that drinking two liters of Pepsi a day is not a
great choice. But there are a number of
caveats I would add:
- ·
The purpose of lowering the Pepsi consumption
should not be to lose weight, because it is unlikely to be effective. I know, I know, it seems like eliminating 830
calories from the diet would cause weight loss, but long term, a ton of
research suggests that this isn’t the case (Mann et al, 2007 “Medicare’s search
for effective obesity treatments: diets are not the answer”). The leptin feedback loop is a squirrely little
thing.
- ·
Instead, the point is just to replace that space
in your stomach with some fruits or vegetables.
We actually have proof that eating fruits and vegetables is good for you
(it’s one of the healthy habits in the Matheson study above).
- ·
Suggesting that a patient stop drinking soda is something
that a physician should do from a place of understanding of both the broad
environmental factors that surround consumption in general and the individual
factors that affect that patient’s life.
Pepsi’s 2012 advertising budget is $1.7 billion. (That’s Billion, with a B!) I’m just some
schmuck in a white coat and I certainly don’t have $1.7 billion. Also, if my patient is the single mother of
three kids working two jobs and drinking some Pepsi to stay awake through the
third shift…nagging her would be poor form.
And by ‘poor form,’ I mean judgmental and insensitive. (Though plenty of
doctors think nagging is their Hippocratic duty).
- ·
Doctors should also tell their normal weight
patients not to drink two liters of soda.
It’s not just unhealthy for fat people, it’s unhealthy for everyone. The
other side of the ‘fat = unhealthy’ assumption is that thin = healthy. But as we see in the above chart, thin but
sedentary, drinking, smoking, and eating crap still makes you twice as likely
to die prematurely. Bringing the focus
back to habits rather than bodies means bringing the focus back onto things we
can actually control that are more likely to make a difference.
6. Though there is
cultural bias against obesity, obesity is still legitimately linked to
increased morbidity and therefore is a medical problem.
This is probably the part of Health At Every Size that I
struggle with the most. I feel like some
of the more zealous Fat Acceptance folks try to argue that obesity has
absolutely no corresponding health risks.
Are all the studies of obesity and health risks done in an
environment of unrecognized fat phobia so that all their results are suspect? Yes.
Much the way those old fashioned studies about how the Negroid skull was
associated with lower intelligence were conducted in an environment of racism –
the world view of the scientists absolutely colors the results.
Do almost all the studies of health effects of obesity fail
to control for obvious confounding factors like health habits and socioeconomic
status? Yes.
However, I still believe there are some negative health
consequences of obesity. The data on
hypertension is pretty convincing. Also,
the joint issues you bring up are a great example. That’s just physics – more weight on those joints
causes more degradation.
But, as we have seen, the cause of obesity is outside of an
individual’s control and weight loss efforts are unlikely to have long term
success. So yes, I think it is silly to
say that obesity has no health consequences, but I also think it is silly to
say that because there are negative health consequences people need to just try
harder.
Age is also linked to joint problems, cardiovascular disease,
and cancer. And physicians use this
information when calculating a person’s disease risk, but no one suggests their
patients try really hard to age more slowly.
And I’ve certainly never heard of a doctor refusing to treat the patient
until they successfully get younger.
So yeah, I hope that helps flesh out my stance – I look
forward to your responses/questions/etc!
Also, now that I have learned how to add pictures – here is
a picture of me, planting some vegetables.
Which I totally plan on eating at least 5 of per day. As soon as they grow up.