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. 2024 Oct 10;13(20):6026.
doi: 10.3390/jcm13206026.

The Effect of Four-Month Training on Biochemical Variables in Amateur Cross-Country Skiers

Natalia Grzebisz-Zatońska  1
Affiliations

The Effect of Four-Month Training on Biochemical Variables in Amateur Cross-Country Skiers

Natalia Grzebisz-Zatońska. J Clin Med. .

Abstract

Background/Objectives: Research on the effects of training on the health of amateur cross-country skiers remains limited, particularly on biochemical parameters. Therefore, this study aimed to assess such changes in response to four months of training for amateur cross-country skiers. Methods: Blood samples were collected after spring training in May (active rest) and in September at the end of the preparatory period. The Wilcoxon signed-rank test was used for comparison of both measurements (initial and final). Results: Training in a group of amateur cross-country skiers exerts a statistically significant influence on the decrease in leukocyte count (thousand/µL) (p = 0.045) and the decrease in mean corpuscular hemoglobin concentration (MCHC) (g/dL) (p = 0.021). The other parameters did not show statistically significant changes. Conclusions: The change in MCHC and WBC can be attributed to adaptation to prolonged exercise, with a simultaneous increase in VO2 max. It should not be identified with pathology. The decrease in MCHC was likely attributable to changes in hydration status and a slight reduction in hemoglobin concentration. Similarly, it is recommended that other biochemical parameters be within the reference ranges.

Keywords: biochemistry; cross-country skiing amateur; morphology; training.

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Conflict of interest statement

The author declares that there is no conflict of interest regarding the publication of this article.

Figures

Figure 1
Figure 1
Summary of training loads in hours.
Figure 2
Figure 2
Summary of comprehensive loads in hours and intensity.
Figure 3
Figure 3
Targeted loads in hours per month and intensity.
See this image and copyright information in PMC

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References

    1. Schnohr P., O’Keefe J.H., Marott J.L., Lange P., Jensen G.B. Dose of jogging and long-term mortality: The Copenhagen city heart study. J. Am. Coll. Cardiol. 2015;65:411–419. doi: 10.1016/j.jacc.2014.11.023. - DOI - PubMed
    1. Scheer V., Tiller N.B., Doutreleau S., Khodaee M., Knechtle B., Pasternak A., Rojas-Valverde D. Potential Long-Term Health Problems Associated with Ultra-Endurance Running: A Narrative Review. Sports Med. 2022;52:725–740. doi: 10.1007/s40279-021-01561-3. - DOI - PMC - PubMed
    1. Roberts W.O. Heat and cold: What does the environment do to marathon injury? Sports Med. 2007;37:400–403. doi: 10.2165/00007256-200737040-00033. - DOI - PubMed
    1. Jiang X., Yang X., Zhou H., Baker J.S., Gu Y. Prolonged Running Using Bionic Footwear Influences Lower Limb Biomechanics. Healthcare. 2021;9:236. doi: 10.3390/healthcare9020236. - DOI - PMC - PubMed
    1. Stewart J.A., Merritt E.K., Lidstone D.E., McBride J.M., Zwetsloot K.A. Prolonged cycling lowers subsequent running mechanical efficiency in collegiate triathletes. BMC Sports Sci. Med. Rehabil. 2022;14:149. doi: 10.1186/s13102-022-00543-w. - DOI - PMC - PubMed

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