Nuovi studi sugli esercizi pre immersione

Per chi puo' interessare.
Recenti studi sembrerebbero indicare che un'attivita fisica moderata
prima dell'immersione (2 ore o mezz'ora) diminuisca la formazione di
bolle e renda piu' resistenti alle mdd:

Just last month, two new studies were published examining the effect of
pre-dive exercise on resistance to DCS.

http://www.ncbi.nlm.nih.gov/entrez/q...pubmed&dopt=Ab
stract&list_uids=16018350&query_hl=5
Aerobic exercise 2 hours before a dive to 30msw decreases bubble
formation after decompression. (Blatteau et al, 2005)

In this study, 16 military divers performed 45 minutes of aerobic
exercise 2 hours before being compressed to 30msw in a dry chamber. They
ascended at a rate of 30ft/min with a 3 minute safety stop at 10ft. The
reduction of post-dive bubbles during exercise trials was judged to be
"highly significant."

http://www.ncbi.nlm.nih.gov/entrez/q...pubmed&dopt=Ab
stract&list_uids=15828630&query_hl=5
Exercise ending 30 min pre-dive has no effect on bubble formation in the
rat. (Berge et al, 2005)

Rats were exercised for 90 minutes up to 90% VO2max, then 30 min
afterwards, dived to 200ft on air. There was no difference in bubbling
or mortality between the exercise and control group.

What does this mean for us? The evidence that getting a workout in the
morning before diving is at worst, not harmful, and at best, beneficial,
is accumulating. These results and those of research published last year
give us reason to reexamine previous recommendations, based upon
altitude research, to limit pre-dive exercise. Though certainly there is
room for additional understanding before making outright claims that
pre-dive exercise will reduce your chance of getting bent, it seems that
divers who choose to go for a moderate run, etc., the morning before a
dive are not as crazy as some have suggested.

--
Cafonauta
No Fly Time is one more thing invented by the dive industry to make
people believe that "anyone can dive" and that it is ok to have PFO,
shunts, poor circulation, drink, smoke, be a fat slob, be out of shape
and still dive, so they make up crap for those people that they try to
make a the rest of us believe about ourselves.

Loup G. wrote:

> il protocollo prevedeva 45 minuti di esercizio aerobico 2 ore prima del test
> in camera iperbarica.
> interessante in generale, ma a livello pratico è inapplicabile per la vita
> media. pensa ad un'alzataccia alle 6 di mattina per essere puntuale alle
> 8,30 davanti al gommone partenza ore 9. Dove potresti fare quei 45 minuti?

Beh, all'argentario mi faccio lasciare con la macchina all'incrocio con
la giannella e da lì arrivo di corsa fino al diving :-pppp

--
Cafonauta
No Fly Time is one more thing invented by the dive industry to make
people believe that "anyone can dive" and that it is ok to have PFO,
shunts, poor circulation, drink, smoke, be a fat slob, be out of shape
and still dive, so they make up crap for those people that they try to
make a the rest of us believe about ourselves.

"Cafonauta" <cafonauta@cafo.boh> ha scritto nel messaggio
news:QDySe.48083$F23.586382@twister2.libero.it...

> Beh, all'argentario mi faccio lasciare con la macchina all'incrocio con
> la giannella e da lì arrivo di corsa fino al diving :-pppp

questa la voglio proprio vedere.

"Cafonauta" <cafonauta@cafo.boh> ha scritto nel messaggio
news:TWxSe.48024$F23.584831@twister2.libero.it...
> Per chi puo' interessare.
> Recenti studi sembrerebbero indicare che un'attivita fisica moderata prima
> dell'immersione (2 ore o mezz'ora) diminuisca la formazione di bolle e
> renda piu' resistenti alle mdd:

Interessante.
Allora la mattina posso fare attività aerobica ed il pomeriggio
immersioncina .
Ho rinunciato a molte immersioni perchè in mattinata mi ero sbattuto un po'.
Certo.... non è proprio come previsto dal protocollo.

Cafonauta ha scritto:

> Per chi puo' interessare.
> Recenti studi sembrerebbero indicare che un'attivita fisica moderata
> prima dell'immersione (2 ore o mezz'ora) diminuisca la formazione di
> bolle e renda piu' resistenti alle mdd:
>
> Just last month, two new studies were published examining the effect of
> pre-dive exercise on resistance to DCS.
>
> .....

è la trasposizione scientifico del sano concetto della trombata
pre-immersione: "attività ludo-fisica, buona ossigenazione e completo
rilassamento"

niente di nuovo sotto al sole....

Petruz

petruz ha scritto:

>
> è la trasposizione scientifico del sano concetto della trombata
> pre-immersione: "attività ludo-fisica, buona ossigenazione e completo
> rilassamento"

e se non sei affetto da eiaculazione precoce puoi finirla a 30 metri
:)


--

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Cafonauta ha scritto:
> Per chi puo' interessare.

tò leggiti anche questo

http://jap.physiology.org/cgi/conten.../99/3/944?etoc

Exercise-induced intrapulmonary shunting of venous gas emboli does not
occur after open-sea diving
eljko Duji,1 Ivan Palada,1 Ante Obad,1 Darko Duplani,1 Alf O. Brubakk,2
and Zoran Valic1
1Department of Physiology and Biophysics, University of Split School of
Medicine, Split, Croatia; and 2Department of Circulation and Medical
Imaging, Norwegian University of Science and Technology, Trondheim, Norway


Submitted 30 December 2004 ; accepted in final form 14 April 2005


Paradoxical arterializations of venous gas emboli can lead to
neurological damage after diving with compressed air. Recently,
significant exercise-induced intrapulmonary anatomical shunts have been
reported in healthy humans that result in widening of
alveolar-to-arterial oxygen gradient. The aim of this study was to
examine whether intrapulmonary shunts can be found following strenuous
exercise after diving and, if so, whether exercise should be avoided
during that period. Eleven healthy, military male divers performed an
open-sea dive to 30 m breathing air, remaining at pressure for 30 min.
During the bottom phase of the dive, subjects performed mild exercise at
30% of their maximal oxygen uptake. The ascent rate was 9 m/min. Each
diver performed graded upright cycle ergometry up to 80% of the maximal
oxygen uptake 40 min after the dive. Monitoring of venous gas emboli was
performed in both the right and left heart with an ultrasonic scanner
every 20 min for 60 min after reaching the surface pressure during
supine rest and following two coughs. The diving profile used in this
study produced significant amounts of venous bubbles. No evidence of
intrapulmonary shunting was found in any subject during either supine
resting posture or any exercise grade. Also, short strenuous exercise
after the dive did not result in delayed-onset decompression sickness in
any subject, but studies with a greater number of participants are
needed to confirm whether divers should be allowed to exercise after
diving.