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2024-09

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cc-by (c) Rojas-Chambilla, R.A. et al., 2024
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/215924

Performance in the Six-Minute Walking Test Does Not Discriminate Excessive Erythrocytosis Patients in a Severe Hypoxic Environment

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https://doi.org/10.3390/ijerph21091119

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Background: Chronic exposure to severe hypoxia causes an increase in hematocrit (Hct) and hemoglobin concentration ([Hb]), which can lead to excessive erythrocytosis (EE) and impact physical performance. This work aims to determine the differences in the six-minute walking test (6MWT) between EE and healthy subjects residing at more than 5000 m. Methods: A prospective, cross-sectional study was performed on 71 men (36 healthy and 25 suffering from EE) living in La Rinconada, Peru (5100 m). Basal levels of [Hb] and Hct were obtained. All the subjects performed the 6MWT, and distance reached, vital signs, dyspnea, and fatigue (Borg scale) at the end of the test were recorded. Results: The average [Hb] and Hct levels in the control group were 18.7 ± 1.2 g/dL and 60.4 ± 7.1%, respectively, contrasting with EE subjects, who showed 23.4 ± 1.6 g/dL and 73.6 ± 5.9% (p < 0.001). However, no statistically significant differences were observed in BMI or other anthropometric parameters. At the end of the 6MWT, the distance traveled and vital constants were similar between both groups, except for arterial oxygen saturation, which was consistently lower in subjects with EE throughout the test. Conclusion: EE does not significantly affect 6MWT performance at high altitudes, nor the hemodynamic control during moderate aerobic exercise of subjects who live permanently in a severely hypoxic environment.

Matèries

Andes, Anoxèmia, Influència de l'altitud, Hemoglobina

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Andes, Anoxemia, Influence of altitude, Hemoglobin

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Articles publicats en revistes (Biologia Cel·lular, Fisiologia i Immunologia)

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ROJAS-CHAMBILLA, Rossela alejandra, VILCA-COAQUIRA, Kely melina, TEJADA-FLORES, Jeancarlo, TINTAYA-RAMOS, Henry oscar, QUISPE-TRUJILLO, Mariela mercedes, CALISAYA-HUACASI, Ángel gabriel, QUISPE-HUMPIRI, Solanyela anny, PINO VANEGAS, Yony martin, SALAZAR-GRANARA, Alberto alcibiades, TÁCUNA-CALDERÓN, Ana lucía, GARCÍA-BEDOYA, Nancy mónica, YANG, Moua, VISCOR CARRASCO, Ginés, HANCCO-ZIRENA, Iván. Performance in the Six-Minute Walking Test Does Not Discriminate Excessive Erythrocytosis Patients in a Severe Hypoxic Environment. _International Journal of Environmental Research and Public Health_. 2024. Vol. 21, núm. 9, pàgs. 1-11. [consulta: 7 de febrer de 2026]. ISSN: 1661-7827. [Disponible a: https://hdl.handle.net/2445/215924]

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