High-Frequency Heart Rate Variability Is Prospectively Associated With Sleep Complaints in a Healthy Working Cohort.

Area of Science:

• Psychophysiology
• Sleep Science
• Autonomic Nervous System Research

Background:

• Vagus nerve functioning, indicated by high-frequency heart rate variability (HF-HRV), is linked to various health issues, including sleep problems.
• Previous research suggests a connection between vagus nerve activity and overall well-being.

Purpose of the Study:

• To investigate the association between sleep high-frequency heart rate variability (sleep HF-HRV) and subjective sleep complaints.
• To determine if sleep HF-HRV measured in 2007 predicts sleep complaints four years later.

Main Methods:

• 143 healthy employees (91% male, mean age 47.8) underwent a 24-hour ambulatory heart rate recording in 2007.
• Participants completed the Jenkins Sleep Problems Scale in 2007 and again four years later.
• Hierarchical regression analyses were used to assess the relationship between sleep HF-HRV and sleep complaints.

Main Results:

• Lower sleep HF-HRV in 2007 was significantly associated with higher self-reported sleep complaints four years later (p = .050).
• The association remained after controlling for relevant covariates.
• This indicates a predictive relationship between vagus nerve function during sleep and future sleep quality.

Conclusions:

• This study provides the first evidence that lower sleep HF-HRV predicts worse subjective sleep complaints over a four-year period.
• Findings underscore the crucial role of vagus nerve functioning in maintaining long-term health and adaptability.
• Assessing sleep HF-HRV may offer insights into an individual's risk for developing future sleep disturbances.