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Impact of a 10 km running trial on eryptosis, red blood cell rheology, and electrophysiology in endurance trained athletes: a pilot study

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Abstract

Purpose

Blood rheology is a key determinant of blood flow and tissue perfusion. There are still large discrepancies regarding the effects of an acute running exercise on blood rheological properties and red blood cell (RBC) physiology. We investigated the effect of a 10 km running trial on markers of blood rheology and RBC physiology in endurance trained athletes.

Methods

Blood was sampled before and after the exercise to measure lactate and glucose, hematological and hemorheological parameters (blood viscosity, RBC deformability, and aggregation), eryptosis markers (phosphatidylserine and CD47 exposure, RBC reactive oxygen species), RBC-derived microparticles (RBC-MPs), and RBC electrophysiological activity. Weight was measured before and after exercise. Peripheral oxygen saturation and heart rate were monitored before and during the trial.

Results

Blood lactate and glucose levels increased after exercise and subjects significantly lost weight. All athletes experienced a significant fall in oxygen saturation. Mean corpuscular volume (MCV) was increased from 95.1 ± 3.2 to 96.0 ± 3.3 and mean corpuscular hemoglobin concentration (MCHC) decreased after exercise suggesting a slight RBC rehydration. Exercise increased RBC deformability from 0.344 ± 0.04 to 0.378 ± 0.07, decreased RBC aggregates strength and blood viscosity, while hematocrit (Hct) remained unaffected. While RBC electrophysiological recording suggested a modulation in RBC calcium content and/or chloride conductance, eryptosis markers and RBC-MPs were not modified by the exercise.

Conclusion

A 10 km acute running exercise had no effect on RBC senescence and membrane blebbing. In contrast, this exercise increased RBC deformability, probably through rehydration process which resulted in a decrease in blood viscosity.

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Abbreviations

Ca2+ :

Calcium

CCCP:

Carbonyl cyanide m-chlorophenylhydrazone

EI:

Elongation index

Hb:

Hemoglobin

Hct:

Hematocrit

HR:

Heart rate

Hypermax :

Red blood cell maximum hyperpolarization

MAS:

Maximal aerobic speed

MCH:

Mean corpuscular hemoglobin

MCHC:

Mean corpuscular hemoglobin concentration

MCV:

Mean corpuscular volume

MFI:

Median fluorescence intensity

MPs:

Microparticles

NS:

Not significant

PLA:

Platelets

PS:

Phosphatidylserine

RBC:

Red blood cells

ROS:

Reactive oxygen species

RT:

Room temperature

SPO2 :

Peripheral oxygen saturation

S/V:

Surface to volume ratio

Vm :

Membrane potential

VO2 max :

Maximal oxygen consumption

WBC:

White blood cells

References

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Funding

No funding was received for this study.

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Authors and Affiliations

Authors

Contributions

All the authors approved the final version of the manuscript. EN, PC, DM, SE, MR, SS performed research, analyzed the data, and wrote the manuscript. ES, JH, and MG performed research. CR, PJ, AC, and AS edited the manuscript.

Corresponding author

Correspondence to Philippe Connes.

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Conflict of interest

None of the authors have any conflict of interest.

Additional information

Communicated by Michael Lindinger.

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Philippe Connes and Stéphane Égée are co-last author

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Nader, E., Monedero, D., Robert, M. et al. Impact of a 10 km running trial on eryptosis, red blood cell rheology, and electrophysiology in endurance trained athletes: a pilot study. Eur J Appl Physiol 120, 255–266 (2020). https://doi.org/10.1007/s00421-019-04271-x

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  • DOI: https://doi.org/10.1007/s00421-019-04271-x

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