Waking up feeling unrested isn’t always about how long you slept. Sometimes, it’s the small details you barely notice that matter most.
New research suggests your bedroom temperature could play a bigger role in your health than expected, particularly when it comes to your heart.
A hidden strain during sleep
While you sleep, your body is meant to recover. Heart rate slows, and your system shifts into repair mode. But warmer environments may interfere with that process.
A study published in BMC Medicine tracked older adults during summer nights and found that higher bedroom temperatures were linked to increased heart rate and signs of physical stress.
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These changes were connected to disruptions in the autonomic nervous system, which regulates vital functions like heart rhythm and blood pressure.
Why cooler may be better
When your bedroom is too warm, your body works harder to cool itself down. This added strain can reduce sleep quality and place extra pressure on the cardiovascular system.
Experts suggest that a cooler sleeping environment may support more stable heart activity and better recovery overnight. However, extremes on either end can be disruptive, so balance remains important.
Small changes, real impact
Adjusting your sleep environment doesn’t require much. Lowering the temperature slightly, improving airflow, and avoiding heat buildup before bed can make a difference.
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It’s a simple shift, but over time, it may help your body rest the way it’s meant to.
Source: Prevention
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