Re: Wiggins, as clean as a whistle ?

On Jul 31, 4:25 pm, MagillaGorilla <magi...@xxxxxxxxxxxxxxx> wrote:
Andy Coggan wrote:
On Jul 31, 2:27 pm, MagillaGorilla <magi...@xxxxxxxxxxxxxxx> wrote:
Andy Coggan wrote:
On Jul 31, 9:17 am, MagillaGorilla <magi...@xxxxxxxxxxxxxxx> wrote:

I like how there is no hematocrit data....that's
because it likely would show Wiggins hematocrit increasing and then spiking right
before the Ventoux.

Hematocrit and hemoglobin concentration parallel each other very
closely. Furthermore, since it is the concentration of hemoglobin that
really matters, reporting it and not hematocrit is actually more, not
less, convincing (assuming, of course, that the data are correct). The
only reason that hematocrit is routinely monitored in endurance
sports* is because it easier to measure.

*IIRC, only Nordic skiing relies on a hemoglobin limit, not a
hematocrit limit.

Andy Coggan

I want to take you to task on your bone study I read about in the LA Times.  Let me
know when you're ready.

??

I have never done any bone studies?

Andy Coggan

Okay, I meant your comments about this bone study:

http://articles.latimes.com/2009/feb/16/health/he-cycling16

-----

There is no way cycling itself decreases bone density for the following reasons:

1.) This study fails to rule out diet.
2.) This study fails to rule out the catabolic effect of chronic endurance exercise on
bone loss.
3.) Why would cycling cause a decrease in bone density, but working at an office desk not?

4.) On what basis do you conclude the clavicle would have less bone density due to cycling
given that the upper body is used quite a bit in cycling (i.e. compared to say working at
a desk in a 9-5 job).
5.) If bone loss occurs equally in all bones of cyclists including the forearms, it should
be obvious that it's not the activity itself that is causing the bone loss, but some
indirect effect of chronic endurance exercise (i.e. catabolic effect of 3 hours rides
every day for years leads to lowered calcium uptake, etc.).


1) Why are you asking me, since A) I didn't perform any of the studies
mentioned, and B) didn't express any opinion on them in that article??

2) How does anything you say above contradict the conclusion that long-
term participation in the sport of cycling (and all that that entails)
is frequently associated with below-normal bone mineral density?

Andy Coggan
.

Relevant Pages

  • Re: Wiggins, as clean as a whistle ?
    ... because it likely would show Wiggins hematocrit increasing and then spiking right ... I want to take you to task on your bone study I read about in the LA Times. ... Why would cycling cause a decrease in bone density, but working at an office desk not? ...
    (rec.bicycles.racing)
  • Re: Wiggins, as clean as a whistle ?
    ... because it likely would show Wiggins hematocrit increasing and then spiking right ... There is no way cycling itself decreases bone density for the following reasons: ... Why would cycling cause a decrease in bone density, but working at an office desk not? ...
    (rec.bicycles.racing)
  • Re: Wiggins, as clean as a whistle ?
    ... because it likely would show Wiggins hematocrit increasing and then spiking right ... This study fails to rule out the catabolic effect of chronic endurance exercise on ... Why would cycling cause a decrease in bone density, but working at an office desk not? ... If bone loss occurs equally in all bones of cyclists including the forearms, ...
    (rec.bicycles.racing)
  • Re: Wiggins, as clean as a whistle ?
    ... because it likely would show Wiggins hematocrit increasing and then spiking right ... This study fails to rule out the catabolic effect of chronic endurance exercise on ... Why would cycling cause a decrease in bone density, but working at an office desk not? ... If bone loss occurs equally in all bones of cyclists including the forearms, ...
    (rec.bicycles.racing)
  • Re: Tobias 1995
    ... favorable geometric and biomechanical characteristics in relation to bone ... Clearly weight bearing, high impact activity increases cortical thickness ... Running is associated with increased bone density, ... whereas cycling is associated with a mild decrease in bone ...
    (sci.anthropology.paleo)