Change in hemoglobin mass following descent from high altitude to low altitude.

<p>Subjects were tested at high altitude at the end of a 16 day acclimatization period and upon return to high altitude after descent to low altitude (1525 m) for either 7 (POST7; n = 13) or 21 days (POST21; n = 7). Data are presented as mean ± SD. A) Changes in Hbmass. † Significantly different from POST (p<0.05; main effect of time). There were no significant differences between the POST7 and POST21 groups or between POST and SL (p>0.05). B) Relationship between changes in Hbmass following 16 days high altitude acclimatization and changes in Hbmass following descent to low altitude. C) Relationship between changes in Hbmass and changes in serum ferritin following descent to low altitude for 7 days.