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Open AccessArticle

Monitoring Training and Recovery during a Period of Increased Intensity or Volume in Recreational Endurance Athletes

1
Faculty of Sport and Health Sciences, University of Jyväskylä, 40014 Jyväskylä, Finland
2
KIHU—Research Institute for Olympic Sports, 40101 Jyväskylä, Finland
3
Department of Psychology, Centre for Interdisciplinary Brain Research, University of Jyväskylä, 40014 Jyväskylä, Finland
*
Author to whom correspondence should be addressed.
Academic Editors: Zbigniew Jastrzębski, Guillermo Felipe López Sánchez, Łukasz Radzimiński and Maria Skalska
Int. J. Environ. Res. Public Health 2021, 18(5), 2401; https://doi.org/10.3390/ijerph18052401
Received: 19 January 2021 / Revised: 22 February 2021 / Accepted: 24 February 2021 / Published: 1 March 2021
(This article belongs to the Special Issue Exercise Physiology and Performance)
The purpose of the study was to examine the effects of progressively increased training intensity or volume on the nocturnal heart rate (HR) and heart rate variability (HRV), countermovement jump, perceived recovery, and heart rate-running speed index (HR-RS index). Another aim was to analyze how observed patterns during the training period in these monitoring variables were associated with the changes in endurance performance. Thirty recreationally trained participants performed a 10-week control period of regular training and a 10-week training period of either increased training intensity (INT, n = 13) or volume (VOL, n = 17). Changes in endurance performance were assessed by an incremental treadmill test. Both groups improved their maximal speed on the treadmill (INT 3.4 ± 3.2%, p < 0.001; VOL 2.1 ± 1.8%, p = 0.006). In the monitoring variables, only between-group difference (p = 0.013) was found in nocturnal HR, which decreased in INT (p = 0.016). In addition, perceived recovery decreased in VOL (p = 0.021) and tended to decrease in INT (p = 0.056). When all participants were divided into low-responders and responders in maximal running performance, the increase in the HR-RS index at the end of the training period was greater in responders (p = 0.005). In conclusion, current training periods of increased intensity or volume improved endurance performance to a similar extent. Countermovement jump and HRV remained unaffected, despite a slight decrease in perceived recovery. Long-term monitoring of the HR-RS index may help to predict positive adaptations, while interpretation of other recovery-related markers may need a more individualized approach. View Full-Text
Keywords: endurance performance; running; training load; heart rate variability endurance performance; running; training load; heart rate variability
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MDPI and ACS Style

Nuuttila, O.-P.; Nummela, A.; Häkkinen, K.; Seipäjärvi, S.; Kyröläinen, H. Monitoring Training and Recovery during a Period of Increased Intensity or Volume in Recreational Endurance Athletes. Int. J. Environ. Res. Public Health 2021, 18, 2401. https://doi.org/10.3390/ijerph18052401

AMA Style

Nuuttila O-P, Nummela A, Häkkinen K, Seipäjärvi S, Kyröläinen H. Monitoring Training and Recovery during a Period of Increased Intensity or Volume in Recreational Endurance Athletes. International Journal of Environmental Research and Public Health. 2021; 18(5):2401. https://doi.org/10.3390/ijerph18052401

Chicago/Turabian Style

Nuuttila, Olli-Pekka; Nummela, Ari; Häkkinen, Keijo; Seipäjärvi, Santtu; Kyröläinen, Heikki. 2021. "Monitoring Training and Recovery during a Period of Increased Intensity or Volume in Recreational Endurance Athletes" Int. J. Environ. Res. Public Health 18, no. 5: 2401. https://doi.org/10.3390/ijerph18052401

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