2024 Volume 31 Issue 1 Pages 1-9
It is generally recognized that an increase of the air temperature can result in a rise in the heart rate in summer. The heart rate during sleep may be influenced by room temperature, radiant temperature, in-bed temperature during sleep, and daytime outdoor temperature. We studied influences of various environmental factors on daily changes in the average heart rate during sleep (SHRAve). Measurements were conducted in the bedrooms which 11 participants under study, usually use. Indoor temperature, radiant temperature, humidity, illumination, carbon dioxide concentration, and wind speed were measured as the environmental factors in addition to SHRAve. The results indicate that SHRAve of the females tends to be significantly higher than that of the males. The thermal environment was the most influential factor for SHRAve; the room temperature and radiant temperature showed a particularly significant positive correlation. Multi-level SEM showed that gender and operative temperature (OT) served as the most influential factors for SHRAve. As a result, Individual SHRAveS and average OT for participants during the observation period had a significant correlation. A significant positive correlation between SHRAve and the OT for 3 of 6 males was observed, that was not replicated across all participants, presenting a challenge for future research.
