This study examined the moderating roles of resting respiratory sinus arrhythmia (RSA) in the relations between adverse childhood experiences (ACEs) and sleep quality (i.e., sleep efficiency, perceived sleep quality, and daily disturbances) in young adulthood. Chinese young adults (N = 259; Mage = 25.85 years) reported on their adverse childhood experiences retrospectively and current sleep quality. Their electrocardiogram (ECG) and respiration data were recorded while they were seated resting and resting RSA scores were computed. Results indicated that ACEs were associated with poor perceived sleep quality and greater daily disturbances among young adults who showed low resting RSA. The associations were not significant among those who showed high resting RSA. These findings suggest that high resting RSA may serve as a protective factor for young adults' sleep against adverse childhood experiences and these effects were consistent for different biological sex and sexual orientation groups.
Keywords: Adverse childhood experiences; Respiratory sinus arrhythmia; Sleep quality; Young adults.
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