High-intensity exercise in the evening does not disrupt sleep in endurance runners.

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  • Additional Information
    • Source:
      Publisher: Springer-Verlag Country of Publication: Germany NLM ID: 100954790 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1439-6327 (Electronic) Linking ISSN: 14396319 NLM ISO Abbreviation: Eur J Appl Physiol Subsets: MEDLINE
    • Publication Information:
      Original Publication: Berlin ; New York : Springer-Verlag, c2000-
    • Subject Terms:
      Exercise* ; Physical Endurance* ; Sports*; Circadian Rhythm/*physiology ; Running/*physiology ; Sleep/*physiology; Actigraphy ; Adult ; Humans ; Male ; Polysomnography ; Time Factors ; Young Adult
    • Abstract:
      Purpose: To investigate the effect of early evening exercise training at different intensities on nocturnal sleep and cardiac autonomic activity in endurance-trained runners.
      Methods: Eight runners completed three experimental trials in a randomised, counterbalanced order. In the early evening (end of exercise 3.5 h before bedtime), participants performed either: (i) a 1 h high-intensity interval running session (HIGH, 6 × 5 min at 90% VO 2peak interspersed with 5 min recovery); (ii) a 1 h low-intensity running session (LOW, 60 min at 45% VO 2peak ) or (iii) no exercise (CON). Subsequent nocturnal sleep was assessed using polysomnography, wristwatch actigraphy, and subjective sleep quality. A two-lead electrocardiogram recorded nocturnal cardiac autonomic activity.
      Results: Total sleep time increased after HIGH (477.4 ± 17.7 min, p = 0.022) and LOW (479.6 ± 15.6 min, p = 0.006) compared with CON (462.9 ± 19.0 min). Time awake was lower after HIGH (31.8 ± 18.5 min, p = 0.047) and LOW (30.4 ± 15.7 min, p = 0.008) compared with CON (46.6 ± 20.0 min). There were no differences between conditions for actigraphy and subjective sleep quality (p > 0.05). Nocturnal heart rate variability was not different between conditions, but average nocturnal heart rate increased after HIGH (50 ± 5 beats min -1 ) compared with LOW (47 ± 5 beats min -1 , p = 0.02) and CON (47 ± 5 beats min -1 , p = 0.028).
      Conclusion: When performed in the early evening, high-intensity exercise does not disrupt and may even improve subsequent nocturnal sleep in endurance-trained runners, despite increased cardiac autonomic activity. Additionally, low-intensity exercise induced positive changes in sleep behaviour that are comparable to those obtained following high-intensity exercise.
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    • Contributed Indexing:
      Keywords: Actigraphy; Heart rate; Heart rate variability; Polysomnography; Running
    • Publication Date:
      Date Created: 20191209 Date Completed: 20201111 Latest Revision: 20201111
    • Publication Date:
      20240829
    • Accession Number:
      PMC6989626
    • Accession Number:
      10.1007/s00421-019-04280-w
    • Accession Number:
      31813044