Effect of nighttime bedroom temperature on heart rate variability in older adults: an observational study.

ABSTRACT:

Background

Climate change is increasing the frequency of hot nights, which may contribute to cardiovascular morbidity and mortality by impairing sleep and autonomic recovery. Despite World Health Organization guidelines for maximum daytime indoor temperatures (26 °C, 79 °F), there are no equivalent recommendations for nighttime conditions. We investigated the impact of nocturnal bedroom temperature on heart rate and heart rate variability (HRV) in free-living older adults.

Methods

In this observational study, 47 community-dwelling adults aged ≥ 65 years in southeast Queensland, Australia, were monitored across one summer (December 2024-March 2025). Wearable devices recorded heart rate and HRV during nighttime periods of sleep between the hours of 9 PM-7 AM, while in-home sen

SUBMITTER: O'Connor FK 

PROVIDER: S-EPMC12751657 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature