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Related Experiment Videos

Heart rate variability during long truck driving work.

S Sato1, K Taoda, M Kawamura

  • 1Department of Occupational Health, Kin-I-Kyo Sapporo Hospital, Sapporo, Japan.

Journal of Human Ergology
|October 21, 2003
PubMed
Summary

Long-haul truck drivers experience increased parasympathetic nervous activity during morning driving shifts, potentially leading to drowsiness and reduced attention. This highlights the need for improved working conditions and reduced hours for these drivers.

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Area of Science:

  • Occupational Health
  • Autonomic Nervous System Physiology
  • Cardiovascular Stress

Background:

  • Long-distance truck driving involves prolonged work hours and sedentary periods.
  • Autonomic nervous system (ANS) function is crucial for maintaining alertness and cardiovascular health.
  • Understanding ANS responses in truck drivers can inform strategies to mitigate occupational risks.

Purpose of the Study:

  • To investigate the autonomic nervous function in long-distance truck drivers during their work shifts.
  • To correlate ANS activity with work patterns, including driving and napping periods.
  • To assess the impact of ANS function on potential risks like drowsiness and disrupted attention.

Main Methods:

  • Ambulatory electrocardiograms (ECG) were recorded for 6 long-distance truck drivers.

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  • Work patterns were logged minute-by-minute.
  • R-R interval data was analyzed to calculate RR50 and the Low Frequency to High Frequency (LFP/HFP) power ratio every two minutes.

    • Main Results:

    • RR50 was significantly higher during naps compared to other work periods.
    • The LFP/HFP ratio was significantly lower during naps.
    • Parasympathetic nervous activity predominated in the morning, particularly during driving, compared to the afternoon.

    Conclusions:

    • Morning driving shifts in long-distance truck drivers are characterized by dominant parasympathetic nervous activity.
    • High parasympathetic activity during driving may increase cardiovascular stress and induce drowsiness, potentially impairing attention.
    • Recommendations include reducing work hours and improving working conditions for truck drivers on long shifts.