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Dose-effect of exercise intervention on heart rate variability of acclimatized young male lowlanders at 3,680 m

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  • Additional Information
    • Publication Information:
      Frontiers Media S.A., 2024.
    • Publication Date:
      2024
    • Collection:
      LCC:Physiology
    • Abstract:
      This study investigated whether exercise could improve the reduced HRV in an environment of high altitude. A total of 97 young, healthy male lowlanders living at 3,680 m for >1 year were recruited. They were randomized into four groups, of which three performed—low-, moderate-, and high-intensity (LI, MI, HI) aerobic exercise for 4 weeks, respectively. The remaining was the control group (CG) receiving no intervention. For HI, compared to other groups, heart rate (p = 0.002) was significantly decreased, while standard deviation of RR intervals (p < 0.001), SD2 of Poincaré plot (p = 0.046) and the number of successive RR interval pairs that differ by > 50 ms divided by total number of RR (p = 0.032), were significantly increased after intervention. For MI, significantly increase of trigonometric interpolation in NN interval (p = 0.016) was observed after exercise. Further, a decrease in systolic blood pressure (SBP) after high-intensity exercise was found significantly associated with an increase in SD2 (r = – 0.428, p = 0.042). These results indicated that there was a dose effect of different intensities of aerobic exercise on the HRV of acclimatized lowlanders. Moderate and high-intensity aerobic exercise would change the status of the autonomic nervous system (ANS) and decrease the blood pressure of acclimatized lowlanders exposed to high altitude.
    • File Description:
      electronic resource
    • ISSN:
      1664-042X
    • Relation:
      https://www.frontiersin.org/articles/10.3389/fphys.2024.1331693/full; https://doaj.org/toc/1664-042X
    • Accession Number:
      10.3389/fphys.2024.1331693
    • Accession Number:
      edsdoj.b4a1c7c224c64438a2751759e5797d97