JTEM is so reasonable wrote:
Primum Sapienti wrote:
Interesting: "runners, both men and women, were the
most fit"
Interesting that "Most fit" is associated with more likely to die.
Very interesting.
That's what the author said. Ironic, eh? :=DDD
"He was very fit. That's why he died."
Again, I am being supportive towards you, in the same way
that you claim "More likely to die" is "More fit."
The study only included a few swimmers, 562 vs over TWENTY
THOUSAND runners. Now, how about actually including MORE swimmers?
Watch their mortality rate...
https://www.latimes.com/archives/la-xpm-2010-jul-19-la-he-swimming-20100719-story.html
Swimming with the fittest?
JULY 19, 2010
...
"So I was thrilled when I opened the May-June 2010
issue of Swimmer and found an article about a 2008
study by Steven Blair, a leading exercise scientist
from the University of South Carolina.
"This study, which involved 40,547 men ages 20-90 who
completed health exams between 1971 and 2003, found
that “swimmers had lower mortality rates than those
who were sedentary, walkers or runners.” The study
was funded by the National Institutes of Health and
the National Swimming Pool Foundation and was
published in a new peer-reviewed journal, the
International Journal of Aquatic Research and
Education.
"It was the first time anybody had compared the
long-term benefits of swimming with other activities —
and my sport won.
...
"Blair himself, in a telephone interview, is cautious.
The 13-year study, he says, does “show that swimmers
have lower death rates” than sedentary people, walkers
and runners. “That’s what the data show.” But swimmers
being more fit than runners? “It doesn’t quite make
sense to me,” he says with a laugh.
"Over the course of the study, 1,336 of the 20,356
runners (or 6.6%) had died, compared with only 11 of
the 562 swimmers (1.9%). “That small number of
[swimmer] deaths could lead to erroneous
conclusions,” he says.
In addition, the study was “observational” — that
is, the researchers simply followed the different
groups of people over time to see how they fared,
as opposed to randomly assigning them to different
interventions.
"“My guess is that there were a lot of differences
in the people who chose to be swimmers,” says Steven
Woloshin, a professor of medicine at the Dartmouth
Institute who analyzes the interpretation of
scientific studies.
...
"In another 2008 study using treadmill tests and other
measures of cardiorespiratory fitness, Blair’s team
showed that while runners, both men and women, were the
most fit, “the general pattern of fitness distributions
was similar for swimmers and runners.”
"On the downside, one of the chief benefits of swimming —
being weightless in the water, a boon for aching joints
— is also a disadvantage.
“Swimming does not build bone,” says Dr. Michael Holick,
an osteoporosis expert at the Boston University School
of Medicine. “It’s pounding the pavement that is
translated to hip and spine bone strength. Even
treadmills and elliptical machines are not the same,” he
says."
...
Interesting: "runners, both men and women, were the
most fit" and "swimming does not build bone" ;)
From the pdf
https://scholarworks.bgsu.edu/cgi/viewcontent.cgi?article=1247&context=ijare
"A large majority of participants were White and from
middle or upper socioeconomic strata"
Does not appear to be very diverse...
"There were 15,883 sedentary men, 562 swimmers,
3,746 walkers, and 20,356 runners"
Only 562 swimmers? Versus over 20,000 runners?
"A major limitation of the analyses is the small
number of deaths in swimmers (n = 11), although
one would expect that the small number would
lead to wide confidence intervals and reduce the
possibility of finding significant differences
between swimmers and the other activity groups.
The study population was limited to predominantly
White, well-educated, middle- to upper-class men.
This limits the generalizability of the study’s
findings, although it should not affect the
study’s internal validity. Moreover, there is no
compelling reason to assume that the benefits of
swimming would be lower in other socioeconomic
groups."
I do not see where they give frequency of exercise,
that is, how many times per week for these physical
activities. How many times per week on average did
a swimmer go swimming or a runner go running? How
far for each activity?
A sample of 562 swimmers versus 20,356 runners? How is
this comparable?
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