Your bedroom temperature could be putting your heart in serious danger, study warns

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The temperature of the bedroom at night could affectheart health— particularly in older adults.

Heat places extra demands on the cardiovascular system, according to lead study author Dr.Fergus O’Connor from Griffith University in Queensland, Australia.

When the human body is exposed to heat, its reaction is to work harder to try and circulate blood to the skin surface for cooling, he noted.

COMMON SLEEP AID COULD BE QUIETLY INTERFERING WITH YOUR REST, STUDY SUGGESTS

“However, when the heart works harder and for longer, it creates stress and limits our capacity to recover from the previous day’s heat exposure,” O’Connor stated in a press release.

Researchers aimed to understand how real-world bedroom temperatures affectedolder adults.

Man sleeping peacefully in bed, resting on his side under a gray blanket in a softly lit bedroom

When the heart works harder and for longer, it creates stress and limits its capacity to recover from the previous day’s heat exposure.(iStock)

The team followed 47 adults living in southeast Queensland averaging 72 years of age.

While many sleep observations are conducted in special clinics, this was a “free-living” study, meaning the participants carried on with their normal activities and sleep schedules.

SIMPLE NIGHTLY HABIT LINKED TO HEALTHIER BLOOD PRESSURE, STUDY SUGGESTS

Scientists monitored the participants throughout an entire Australian summer, from December to March.Each person wore a high-techfitness trackerto monitor their heart rate from 9 p.m.to 7 a.m., according to the release.

While many sleep observations are conducted in special sleep clinics, this was a “free-living” study, meaning the group carried on with their normal activities and sleep schedules.(iStock)

Sensors were then placed directly in participants’ bedrooms to record the temperatures, monitoring over 14,000 nighttime hours of sleep in total.

SLEEP TIMING COULD DIRECTLY IMPACT CHANCES OF HEART ATTACK OR STROKE, STUDY SUGGESTS

The temperature at which the heart began to show signs of disruption was a little more than 75 degrees Fahrenheit.

Between 75 and 79 degrees Fahrenheit, the odds of a “clinically relevant” drop inheart recoveryrose by 40%, the researchers found.

Man half-asleep in his bed, shot from the ceiling

Between 75 and 79 degrees Fahrenheit, the odds of a “clinically relevant” drop in heart recovery rose by 40%.(iStock)

“For individuals aged 65 years and over, maintaining overnight bedroom temperatures at 24 C (75.2 F) reduced the likelihood of experiencing heightened stress responses during sleep,” O’Connor said.

“When the heart works harder and for longer, it creates stress and limits our capacity to recover from the previous day’s heat exposure.”

Also, while the wearable devices are advanced, they are not as precise as the medical-grade ECGsused in clinical settings.

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O’Connor emphasized a gap in temperature guidance — while there are guidelines for maximum daytime indoor temperature, there are no equivalent recommendations for nighttime conditions.

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The study was published in the journal BMC Medicine.

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