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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology


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The Journal of Sports Medicine and Physical Fitness 2017 Oct 24

DOI: 10.23736/S0022-4707.17.07819-7

Copyright © 2017 EDIZIONI MINERVA MEDICA

language: English

Training-induced annual changes in red blood cell profile in highly-trained endurance and speed-power athletes

Monika CIEKOT-SOŁTYSIAK 1 , Krzysztof KUSY 1, Tomasz PODGÓRSKI 2, Jacek ZIELIŃSKI 1

1 Department of Athletics, Strength and Conditioning, Poznan University of Physical Education, Poznan, Poland; 2 Department of Biochemistry, Poznan University of Physical Education, Poznan, Poland


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BACKGROUND: An extensive body of literature exists on the effects of training on haematological parameters, but the previous studies have not reported how hematological parameters respond to changes in training loads within consecutive phases of the training cycle in highly-trained athletes in extremely different sport disciplines. The aim of this study was to identify changes in red blood cell (RBC) profile in response to training loads in consecutive phases of the annual training cycle in highly-trained sprinters (8 men, aged 24 ± 3 years) and triathletes (6 men, aged 24 ± 4 years) who competed at the national and international level.
METHODS: Maximal oxygen uptake (VO2max), RBC, haemoglobin (Hb), haematocrit (Ht), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC) and RBC distribution width (RDW) were determined in four characteristic training phases (transition, general subphase of the preparation phase, specific subphase of the preparation phase and competition phase).
RESULTS: Our main findings are that (1) Hb, MCH and MCHC in triathletes and MCV in both triathletes and sprinters changed significantly over the annual training cycle, (2) triathletes had significantly higher values than sprinters only in case of MCH and MCHC after the transition and general preparation phases but not after the competition phase when MCH and MCHC were higher in sprinters and (3) in triathletes, Hb, MCH and MCHC substantially decreased after the competition phase, which was not observed in sprinters. The athletes maintained normal ranges of all haematological parameters in four characteristic training phases.
CONCLUSIONS: Although highly-trained sprinters and triathletes do not significantly differ in their levels of most haematological parameters, these groups are characterized by different patterns of changes during the annual training cycle. Our results suggest that when interpreting the values of haematological parameters in speed-power and endurance athletes, a specific phase of the annual training cycle should be taken into account.


KEY WORDS: Speed-power athletes - Endurance - Trained athletes - Training cycle - Haematological parameters

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Publication History

Article first published online: October 24, 2017
Manuscript accepted: October 9, 2017
Manuscript revised: September 25, 2017
Manuscript received: May 26, 2017

Cite this article as

Ciekot-Sołtysiak M, Kusy K, Podgórski T, Zieliński J. Training-induced annual changes in red blood cell profile in highly-trained endurance and speed-power athletes. J Sports Med Phys Fitness 2017 Oct 24. DOI: 10.23736/S0022-4707.17.07819-7

Corresponding author e-mail

ciekot@awf.poznan.pl