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. 2022 Oct 15;11(10):1513.
doi: 10.3390/biology11101513.

Effect of Intermittent Hypoxic Training on Selected Biochemical Indicators, Blood Rheological Properties, and Metabolic Activity of Erythrocytes in Rowers

Aneta Teległów  1 , Mateusz Mardyła  2 , Michał Myszka  3 , Tomasz Pałka  2 , Marcin Maciejczyk  2 , Przemysław Bujas  4 , Dariusz Mucha  2 , Bartłomiej Ptaszek  5 , Jakub Marchewka  6
Affiliations

Effect of Intermittent Hypoxic Training on Selected Biochemical Indicators, Blood Rheological Properties, and Metabolic Activity of Erythrocytes in Rowers

Aneta Teległów et al. Biology (Basel). .

Abstract

The study assessed the effect of 3-week intermittent hypoxic training on blood biochemical indicators (blood morphology, fibrinogen), blood rheological properties (erythrocyte deformability, aggregation), erythrocyte enzymatic activity (acetylcholinesterase), and maximal oxygen uptake in competitive rowers. Fourteen male rowers were divided into two equal groups: experimental, training on ergometers under normobaric hypoxia (FiO2 = 16.0%), and control, training on ergometers under normoxia (FiO2 = 21%). Fasting blood was taken before and after training. A significant between-group difference in neutrophil levels before training was noted and a significant decrease in white blood cells in the hypoxia group. Both groups exhibited an increase in elongation index. In the normoxia group, a significant increase in erythrocyte aggregation amplitude was revealed. No significant changes occurred in the other biochemical indicators or those evaluating erythrocyte metabolic activity. Normobaric hypoxia increased erythrocyte deformability, improving blood rheological properties. Maximal oxygen uptake significantly increased only in the experimental group.

Keywords: biochemical indicators; blood rheology; erythrocyte metabolic activity; hypoxia; maximal oxygen uptake; rowers; training.

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Conflict of interest statement

The authors declare no conflict of interest. The funder had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Figure 1
Figure 1
Maximal oxygen uptake (VO2max) during intermittent hypoxic training (IHT) and normoxia (CON, control) training (*: p < 0.05).
Figure 2
Figure 2
Red blood cell deformability (elongation index, EI) at particular shear stress values in rowers training in the hypoxia (intermittent hypoxic training, IHT) and normoxia (control, CON) conditions before and after the intervention.
Figure 3
Figure 3
Red blood cell aggregation index (AI) in rowers training in the hypoxia (intermittent hypoxic training, IHT) and normoxia (control, CON) conditions before and after the intervention.
Figure 4
Figure 4
Red blood cell aggregation amplitude (AMP) in rowers training in the hypoxia (intermittent hypoxic training, IHT) and normoxia (control, CON) conditions before and after the intervention (*: p < 0.05, NS: non-significant).
Figure 5
Figure 5
Half-time of total red blood cell aggregation (T1/2) in rowers training in the hypoxia (intermittent hypoxic training, IHT) and normoxia (control, CON) conditions before and after the intervention.
See this image and copyright information in PMC

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