Do Men and Women Differ in Hematological Adaptations to 24 Weeks of Crossfit® Training?

Regular exercise can modulate the immune system functioning through changes in the number and function of leukocytes as well as in red blood cells and other typical blood markers. High intensity exercise promotes increases in cytotoxic activity, phagocytic capacity, chemotaxis and cell apoptosis. Th...

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Bibliographic Details
Published inJournal of human kinetics Vol. 90; pp. 101 - 110
Main Authors Barreto, Ana Cristina, Leitão, Luis, Vianna, Jeferson, Poderoso, Rodrigo, Reis, Victor Machado, Cirilo-Sousa, Maria, Junior, Adenilson, Colonna, Marcelo, Casimiro-Lopes, Gustavo, Novaes, Jefferson
Format Journal Article
LanguageEnglish
Published Poland Termedia Publishing House 01.01.2024
Subjects
Research Paper
red blood cells
white blood cells
interval training
high intensity
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Summary:Regular exercise can modulate the immune system functioning through changes in the number and function of leukocytes as well as in red blood cells and other typical blood markers. High intensity exercise promotes increases in cytotoxic activity, phagocytic capacity, chemotaxis and cell apoptosis. The aim of the study was to compare the chronic effects of a 24-week training program using CrossFit® methodology on hematological variables of men vs. women. Twenty-nine CrossFit® athletes (35.3 ± 10.4 years, 175.0 ± 9.2 cm, 79.5 ± 16.4 kg) participated in the study. The blood count, the lipid profile and glucose markers were measured every two months during the study period. The erythrocyte count and hemoglobin concentrations increased in months 4 and 6 in men and women, respectively. Hematocrit levels increased in men in months 2, 4 and 6, while in women only in month 6. Red cell distribution width increased in men in month 6 when compared to the value in month 2. Segmented neutrophils increased in men in month 6 and eosinophil levels increased in women in month 6. Differences between the two sexes were observed in monocytes levels at baseline, as well as in months 2, 4 and 6. Cross-Fit training increased red cell count indicators in both sexes, which may be related to increased erythropoiesis. Some white blood cell counts were altered and these differed between sexes. The number of lymphocytes remained stable throughout the experiment.
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ISSN:1640-5544
1899-7562
DOI:10.5114/jhk/170885