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Related Experiment Video

Updated: Jan 28, 2026

Driving Under the Influence: How Music Listening Affects Driving Behaviors
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Heart Rate Change While Drowsy Driving.

Sang-Ho Jo1, Jin-Myung Kim2, Dong Kyoo Kim3

  • 1Division of Cardiology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea.

Journal of Korean Medical Science
|March 6, 2019
PubMed
Summary
This summary is machine-generated.

Sleepy driving significantly decreases heart rate (HR). This pilot study monitored healthy volunteers, finding a notable HR drop during drowsy driving episodes, highlighting a new risk factor.

Keywords:
DrivingHeart RateSleep

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Area of Science:

  • Cardiovascular Physiology
  • Sleep Medicine
  • Traffic Safety

Background:

  • Sleepy driving is a significant public health concern, increasing accident risks.
  • Physiological changes during sleepy driving, particularly heart rate (HR) variability, remain under-investigated.

Purpose of the Study:

  • To investigate heart rate (HR) changes in healthy volunteers during sleepy driving.
  • To determine if HR decreases or increases during episodes of drowsiness while driving.

Main Methods:

  • Six healthy volunteers participated in a 24-hour Holter monitoring study.
  • Participants drove long distances, with their HR recorded continuously.
  • Sleepy driving episodes were identified and analyzed for HR patterns.

Main Results:

  • Mean driving HR showed a slight, non-significant trend towards increment (85 to 89.8 bpm).
  • Mean HR significantly decreased during sleepy driving episodes (81.5 bpm, a 9.3% reduction, P=0.046).

Conclusions:

  • This pilot study provides the first evidence that heart rate decreases during sleepy driving.
  • The observed HR reduction during drowsiness may indicate altered autonomic nervous system activity and warrants further investigation.