Newsgroup: it.sport.ciclismo
Titolo: Cunego, doppietta

http://www.gazzetta.it/Speciali/Giroditalia/2009/it/Primo_Piano/2009/03/26/cunego_2603.shtml
ma tanto andare ad allenarsi in quota non serviva ad un cazzo, no?

 ma tanto andare ad allenarsi in quota non serviva ad un cazzo, no?
Serve ad alzare naturalmente il già naturalmente alto ematocrito!
Pikkio 

 ma tanto andare ad allenarsi in quota non serviva ad un cazzo, no?
Visto il giro 2009 direi che ci può fare un pensierino.
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 ma tanto andare ad allenarsi in quota non serviva ad un cazzo, no?
High-altitude training. Aspects of haematological adaptation.
Berglund B.
Department of Medicine, Karolinska Hospital, Stockholm, Sweden.
Physical training at high altitude improves performance at high altitude. 
However, studies assessing performance improvements at sea level after 
training at higher altitudes have produced ambiguous and inconclusive 
results. Hypoxia-induced secondary polycythemia is a major contributor to 
increased work capacity at altitude. The common finding upon exposure to 
hypoxia is a transient increase in haemoglobin concentration and haematocrit 
because of a rapid decrease in plasma volume followed by an increase in 
erythropoiesis per se. Both nonathletes and elite endurance athletes have 
maximal reticulocytosis after about 8 to 10 days at moderate altitude. 
Training periods of 3 weeks at moderate altitudes result in individual 
increase of haemoglobin concentration of about 1 to 4%. A more accentuated 
increase in haemoglobin can be obtained with longer sojourns at moderate 
altitude. The normal erythropoietin reaction upon exposure to hypoxia 
comprises initially increased levels followed by a decrease after about 1 
week. Thus, the maintenance of a high erythropoietin concentration is not a 
prerequisite for a sustained increase in erythrocyte formation at high 
altitude. The main pharmacological modulator of erythropoietin production 
seems to be adenosine. But modulators such as growth hormone and 
catecholamines may also potentiate the effect of hypoxia per se on 
erythropoietin production. On the other hand, there is a risk that the 
stress hormones may induce a relative depression of the bone marrow 
particularly in the early phase of altitude training when the adaptation is 
minimal and the stress reaction is most accentuated. The most important 
'erythropoiesis-specific' nutrition factor is iron availability which can 
modulate erythropoiesis over a wide range in humans. Adequate iron stores 
are a necessity for haematological adaptation to hypoxia. However, at 
moderate altitude, there is a need for rapid mobilisation of iron and even 
if the stores are normal there is a risk that they cannot be mobilised fast 
enough for an optimal synthesis of haemoglobin. Data from healthy athletes 
training at moderate altitudes suggest a true increase in haemoglobin 
concentration of about 1% per week. Complete haematological adaptation 
occurred when sea level residents have similar haemoglobin concentrations at 
moderate altitude compared with residents. The normal difference in 
haemoglobin concentrations can be estimated to be about 12% between 
permanent residents at sea level and at 2500m above sea level. This 
difference indicates a necessary adaptation time of about 12 weeks. If the 
training period at moderate altitude must be shorter, several sojourns at 
short intervals are recommended. The important factor in haematological 
adaptation in athletes at moderate altitude is hypoxia.(ABSTRACT TRUNCATED 
AT 400 WORDS)
PMID: 1439397 [PubMed - indexed for MEDLINE]
-- 
WNC2 - World Nutrition Center 2 - Integratori per lo sport
ONLINE STORE: 
http://www.wnc2.biz
E-Mail: 
LEVAILwnc...@wnc2.biz

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è reato?        

Visto il giro 2009 direi che ci può fare un pensierino.
http://groups.google.it/group/it.sport.ciclismo/msg/4357a1ac17a07997?hl=it
 

High-altitude training. 
non ho voglia di leggere tutto, ma son d'accordo con te.

 non ho voglia di leggere tutto, ma son d'accordo con te.
se mi dai l'indirizzo, ti mando delle camb.... ehmm dei foglietti, non 
starli a leggere tanto siamo d'accordo, firmali e rimandameli :-)
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 ha scritto nel messaggio 
news:49cc9fad$1...@x-privat.org...
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No! E' ironia!
Pikkio 

> Serve ad alzare naturalmente il già naturalmente alto ematocrito!
ai medici piacciono le località di montagna...