| Arterial oxygen saturation and hemoglobin mass in postmenopausal untrained and trained altitude residents. | |
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MedLine Citation:
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PMID: 18081505 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Because of lacking ventilatory stimulation by sex hormones in postmenopausal women (PW), one might expect a lowered arterial oxygen saturation (S(O(2))) in hypoxia and therefore a stronger erythropoietic reaction than in young women (YW). Nine untrained (UTRPW) and 11 trained (TRPW) postmenopausal altitude residents (2600 m) were compared to 16 untrained (UTRYW) and 16 trained young women (TRYW) to check this hypothesis and to study the combined response to hypoxia and training. S(O(2)) was decreased in PW (89.2% +/- 2.2 vs. 93.6 +/- 0.7% in YW, p < 0.01). Hb mass, however, was similar in UT (UTRYW: 9.2 +/- 0.9 g/kg(1), UTRPW: 8.7 +/- 1.0 g/kg). But if body fat rise with age was excluded by relation to fat-free mass, Hb mass was increased in UTRPW (+1.2 g/kg, p < 0.05) compared to UTRYW. Training caused a similar rise of Hb mass in PW and YW (0.3 g/kg per mL/kg x min(1) rise in V(O(2peak))). There was no difference in erythropoietin among the groups. Ferritin was higher in PW than YW. The results show that female hormones and fitness level have to be considered in studies on erythropoiesis at altitude. The role of erythropoietin during chronic hypoxia still has to be clarified. |
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Authors:
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Edgar Cristancho; Orlando Reyes; Mauricio Serrato; María Mercedes Mora; Joel Alberto Rojas; Yohan Robinson; Dieter Böning |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: High altitude medicine & biology Volume: 8 ISSN: 1527-0297 ISO Abbreviation: High Alt. Med. Biol. Publication Date: 2007 |
Date Detail:
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Created Date: 2007-12-17 Completed Date: 2008-03-11 Revised Date: 2009-07-07 |
Medline Journal Info:
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Nlm Unique ID: 100901183 Medline TA: High Alt Med Biol Country: United States |
Other Details:
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Languages: eng Pagination: 296-306 Citation Subset: IM; S |
Affiliation:
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Institute of Sports Medicine, Charité, University Medicine Berlin. ecristancho@unal.edu.co |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acclimatization
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physiology* Adult Altitude* Blood Volume / physiology Colombia Female Hematocrit Hemoglobins / analysis* Humans Middle Aged Oxygen / blood Oxygen Consumption / physiology* Physical Fitness / physiology* Reticulocyte Count |
| Chemical | |
Reg. No./Substance:
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0/Hemoglobins; 7782-44-7/Oxygen |
| Comments/Corrections | |
Erratum In:
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High Alt Med Biol. 2009 Spring;10(1):105 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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