Newsgroup: it.hobby.scuba
Titolo: 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/query.fcgi?cmd=Retrieve&db=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/query.fcgi?cmd=Retrieve&db=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.

 bolle e renda piu' resistenti alle mdd:
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?

 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


 la giannella e da lě arrivo di corsa fino al diving :-pppp
questa la voglio proprio vedere.

 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. 

 .....
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

 rilassamento"
e se non sei affetto da eiaculazione precoce puoi finirla a 30 metri 
:)
-- 
questo articolo e` stato inviato via web dal servizio gratuito 
http://www.newsland.it/news
 segnala gli abusi ad 
ab...@newsland.it

 Per chi puo' interessare.
tò leggiti anche questo
http://jap.physiology.org/cgi/content/abstract/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.