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Central and Peripheral Fatigue in Recreational Trail Runners: A Pilot Study

Author

Listed:
  • Iker Muñoz-Pérez

    (Facultad de Ciencias de la Educación y Deporte, Universidad de Deusto, 48007 Bilbao, Spain)

  • Adrián Varela-Sanz

    (Physical and Sports Education Department, Faculty of Sport Sciences and Physical Education, University of A Coruna, 15179 A Coruna, Spain)

  • Carlos Lago-Fuentes

    (Facultad de Ciencias de la Salud, Universidad Europea del Atlántico, 39011 Santander, Spain)

  • Rubén Navarro-Patón

    (Facultad de Formación del Profesorado, Universidade de Santiago de Compostela, 27001 Lugo, Spain)

  • Marcos Mecías-Calvo

    (Facultad de Formación del Profesorado, Universidade de Santiago de Compostela, 27001 Lugo, Spain)

Abstract

Background: Understanding fatigue mechanisms is crucial for exercise performance. However, scientific evidence on non-invasive methods for assessing fatigue in trail running competitions is scarce, especially when vertical kilometer trail running races (VK) are considered. The main purpose of this study was to assess the autonomic nervous system (ANS) activity (i.e., central fatigue) and the state of muscle activation (i.e., peripheral fatigue) before and after a VK competition. Methods: A cross-sectional pilot study was performed. After applying inclusion/exclusion criteria, 8 recreational male trail runners (31.63 ± 7.21 yrs, 1.75 m ± 0.05 m, 70.38 ± 5.41 kg, BMI: 22.88 ± 0.48, running experience: 8.0 ± 3.63 yrs, weekly training volume: 58.75 ± 10.35 km) volunteered to participate and were assessed for both central (i.e., via heart rate variability, HRV) and peripheral (via tensiomyography, TMG) fatigue before and after a VK race. Results: After the VK, resting heart rate, RMSSD ( p = 0.01 for both) and SDNN significantly decreased ( p = 0.02), while the stress score and the sympathetic-parasympathetic ratio increased ( p = 0.01 and p = 0.02, respectively). The TMG analyses suggest that runners already suffered peripheral fatigue before the VK and that 20–30 min are enough for muscular recovery after the race. In summary, our data suggest that participants experienced a pre-competition fatigue status. Further longitudinal studies are necessary to investigate the mechanisms underlying fatigue during trail running races, while training periodization and tapering strategies could play a key role for minimizing pre-competition fatigue status.

Suggested Citation

  • Iker Muñoz-Pérez & Adrián Varela-Sanz & Carlos Lago-Fuentes & Rubén Navarro-Patón & Marcos Mecías-Calvo, 2022. "Central and Peripheral Fatigue in Recreational Trail Runners: A Pilot Study," IJERPH, MDPI, vol. 20(1), pages 1-11, December.
    • Handle: RePEc:gam:jijerp:v:20:y:2022:i:1:p:402-:d:1016088
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    References listed on IDEAS

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    1. María Carrasco-Poyatos & Alberto González-Quílez & Ignacio Martínez-González-Moro & Antonio Granero-Gallegos, 2020. "HRV-Guided Training for Professional Endurance Athletes: A Protocol for a Cluster-Randomized Controlled Trial," IJERPH, MDPI, vol. 17(15), pages 1-12, July.
    2. César Berzosa & Héctor Gutierrez & Pablo Jesús Bascuas & Irela Arbones & Ana Vanessa Bataller-Cervero, 2021. "Muscle Tone and Body Weight Predict Uphill Race Time in Amateur Trail Runners," IJERPH, MDPI, vol. 18(4), pages 1-9, February.
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