New research analyzed the impact of sleep duration on the health of more than 7,000 men and women at the ages of 50, 60 and 70. Researchers examined the relationship between how long each participant slept for, mortality(死亡率) and whether they had been diagnosed with two or more chronic(慢性的) diseases (multimorbidity)—such as heart disease, cancer or diabetes—over the course of 25 years.
People who reported getting five hours of sleep or less at age 50 were 20% more likely to have been diagnosed with a chronic disease and 40% more likely to be diagnosed with two or more chronic diseases over 25 years, compared to people who slept for up to seven hours. Additionally, sleeping for five hours or less at the age of 50, 60, and 70 was linked to a 30% to 40% increased risk of multimorbidity when compared with those who slept for up to seven hours. Researchers also found that sleep duration of five hours or less at age 50 was associated with a 25% increased risk of mortality over the 25 years of follow-up.
Lead author Dr Severine Sabia said: “As people get older, their sleep habits and sleep structure change. It is recommended to sleep for 7 to 8 hours a night. To ensure a better night’s sleep, it’s advised to remove electronic devices and avoid large meals before bedtime. Physical activity and exposure to light during the day might also promote good sleep.”
Jo Whitmore said: “Getting enough sleep allows your body to rest. There are a host of other ways that poor sleep could increase the risk of heart disease or stroke, including by increasing inflammation(炎症) and increasing blood pressure. This research adds to a growing body of research that highlights the importance of getting a good night’s sleep.”
However, researchers used self-reported data on sleep, which is likely to be subject to reporting bias. Meanwhile, data on sleep quality was only available for those aged 60 and 70. And participants only involve members of the civil service, who were all employed and likely to be healthier than the general population.
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