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Article

Comparison of Morning Heart Rate Variability at the Beginning and End of a Competition Season in Elite Speed Skaters

1
Material Health Science Laboratory, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan
2
Nippon Badminton Association, Tokyo 160-0013, Japan
3
Faculty of Liberal Arts and Sciences, Chukyo University, Nagoya 466-8666, Japan
4
Faculty of Sports and Health Sciences, Fukui University of Technology, Fukui 910-8505, Japan
5
Faculty of Physical Education, Japan Women’s College of Physical Education, Tokyo 157-8565, Japan
6
Department of Sport Life Management, Nippon Sport Science University, Kanagawa 227-0033, Japan
7
Faculty of Health and Sport Sciences, University of Tsukuba, Ibaraki 305-8577, Japan
8
Department of Physical Therapy, Faculty of Health Sciences, Kyorin University, Tokyo 181-8612, Japan
*
Author to whom correspondence should be addressed.
Received: 31 October 2020 / Revised: 2 December 2020 / Accepted: 11 December 2020 / Published: 14 December 2020
The aim of this study was to clarify whether the physiological fatigue status of elite speed skaters is influenced by the approximately five-month international competition season by comparing morning heart rate variability (HRV) at the beginning of the competition season (Japan Single Distances Championships: JSDC) with that at the end of the competition season (World Single Distances Championships: WSDC). Five international-class speed skaters participated in the study. HRV indices and subjective fatigue were measured each morning of the four days prior to the first races of the JSDC and WSDC in the 2007/2008 season. The parasympathetic HRV indices: root mean square of the successive R-R interval differences (RMSSD) (JSDC, 61.0 ms; WSDC, 42.1 ms; p < 0.05), high-frequency component power (HF) (JSDC, 1393 ms2; WSDC, 443 ms2; p < 0.05), and normalized unit of HF (HFnu) (JSDC, 53.2%; WSDC, 25.5%; p < 0.05) were lower for the WSDC than for the JSDC. The decrease in these indices may reflect the skaters’ accumulated fatigue during the course of the competition season. Morning measurements of HRV may thus be an efficient way for elite speed skaters and coaches to objectively monitor physiological fatigue throughout the competition season. View Full-Text
Keywords: heart rate variability; speed skating; fatigue; autonomic nervous activity; measure of physiological fatigue in athletes; physiological fatigue measurement; physiological fatigue indices; elite athletes heart rate variability; speed skating; fatigue; autonomic nervous activity; measure of physiological fatigue in athletes; physiological fatigue measurement; physiological fatigue indices; elite athletes
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MDPI and ACS Style

Iizuka, T.; Kon, M.; Maegawa, T.; Yuda, J.; Aoyanagi, T.; Takahashi, H.; Atomi, T.; Shimizu, M.; Atomi, Y. Comparison of Morning Heart Rate Variability at the Beginning and End of a Competition Season in Elite Speed Skaters. Sports 2020, 8, 164. https://0-doi-org.brum.beds.ac.uk/10.3390/sports8120164

AMA Style

Iizuka T, Kon M, Maegawa T, Yuda J, Aoyanagi T, Takahashi H, Atomi T, Shimizu M, Atomi Y. Comparison of Morning Heart Rate Variability at the Beginning and End of a Competition Season in Elite Speed Skaters. Sports. 2020; 8(12):164. https://0-doi-org.brum.beds.ac.uk/10.3390/sports8120164

Chicago/Turabian Style

Iizuka, Taro, Michihiro Kon, Taketeru Maegawa, Jun Yuda, Toru Aoyanagi, Hideyuki Takahashi, Tomoaki Atomi, Miho Shimizu, and Yoriko Atomi. 2020. "Comparison of Morning Heart Rate Variability at the Beginning and End of a Competition Season in Elite Speed Skaters" Sports 8, no. 12: 164. https://0-doi-org.brum.beds.ac.uk/10.3390/sports8120164

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