Rising temperatures around the world are having a devastating impact on our sleep health, with studies suggesting that the prevalence of sleep apnea is expected to increase by as much as threefold due to climate change.
As nights get hotter and hotter, the risk of hospitalization for cardiovascular and mental health conditions increases. But researchers are now warning that this may be linked not just to poor sleep quality but also to an actual increase in sleep apnea events - a condition where people stop breathing dozens or even hundreds of times during the night.
One eye-opening study found that when under-mattress sleep sensors were given to 67,558 people across 17 European countries, the prevalence of sleep apnea events increased by 13% at the peak of a heatwave. The risk was also greater during humid nights, with every 1 degree Celsius increase in nighttime temperature corresponding to a 1.1 percent rise in sleep apnea events.
The researchers predict that if global warming progresses as expected, the number of people affected by sleep apnea could increase by 1.2- to threefold by the end of the century. Those living in cities will be particularly at risk due to chronic air pollution, which can make nighttime breathing more difficult and exacerbate existing health disparities.
The connection between heat and sleep is complex, but it's thought that high temperatures impair our body's ability to cool down at night, leading to lighter, more fragmented sleep - and a greater risk of apnea events. Nitrogen dioxide, in particular, is a strong airway irritant that can promote inflammation and increase the risk of sleep apnea.
While there are many potential explanations for this correlation, researchers are now pointing to possible ways of mitigating risk, including using indoor air filtering devices and losing weight - particularly for those who are overweight or obese. By taking simple steps such as staying hydrated when going to bed, individuals may be able to reduce their risk of apnea events during heatwaves.
The true extent of the impact on sleep health is still unclear, but one thing is certain: rising temperatures are having a profound effect on our ability to get a good night's sleep.
As nights get hotter and hotter, the risk of hospitalization for cardiovascular and mental health conditions increases. But researchers are now warning that this may be linked not just to poor sleep quality but also to an actual increase in sleep apnea events - a condition where people stop breathing dozens or even hundreds of times during the night.
One eye-opening study found that when under-mattress sleep sensors were given to 67,558 people across 17 European countries, the prevalence of sleep apnea events increased by 13% at the peak of a heatwave. The risk was also greater during humid nights, with every 1 degree Celsius increase in nighttime temperature corresponding to a 1.1 percent rise in sleep apnea events.
The researchers predict that if global warming progresses as expected, the number of people affected by sleep apnea could increase by 1.2- to threefold by the end of the century. Those living in cities will be particularly at risk due to chronic air pollution, which can make nighttime breathing more difficult and exacerbate existing health disparities.
The connection between heat and sleep is complex, but it's thought that high temperatures impair our body's ability to cool down at night, leading to lighter, more fragmented sleep - and a greater risk of apnea events. Nitrogen dioxide, in particular, is a strong airway irritant that can promote inflammation and increase the risk of sleep apnea.
While there are many potential explanations for this correlation, researchers are now pointing to possible ways of mitigating risk, including using indoor air filtering devices and losing weight - particularly for those who are overweight or obese. By taking simple steps such as staying hydrated when going to bed, individuals may be able to reduce their risk of apnea events during heatwaves.
The true extent of the impact on sleep health is still unclear, but one thing is certain: rising temperatures are having a profound effect on our ability to get a good night's sleep.