Dana G. Smith reports for The New York Times on the extent to which you control how long you live. How much does a healthy lifestyle help and how much do your genes determine your fate?
For sure, we know about smokers and drinkers, people who eat junk food, as well as people who never exercise, who have lived long and relatively healthy lives. But, the data suggest that these people are the exceptions. If you want to live a long healthy life, you’d better change your lifestyle.
According to the evidence, your behaviors will likely dictate whether you live until you’re 90. Indeed, one recent study found that you can add 24 years to your life if you: 1. eat healthy, 2. exercise, 3. get adequate sleep, 4. don’t smoke, 5. don’t drink excessively, 6. don’t take opioids, 7. manage stress and 8. engage socially. These healthy behaviors should help you to live to around 87.
There’s little you can do to help ensure you will live to 100. But, 87 is pretty good relative to most Americans. In the US today, the average life expectancy is 78.5.
At the end of the day, whether you live a long life depends to the greatest extent on your lifestyle, your daily habits. Genes are responsible only for about 25 percent of your longevity. Living to 100 is far more about your genes than your lifestyle.
There are plenty of people who live very long lives without particularly healthy habits. They smoke and don’t exercise. Because of their genes, they still are not as likely to have chronic conditions, such as heart disease or cancer or dementia.
For example, you are better off carrying the APOE2 gene if you are going to avoid an Alzheimer’s diagnosis. If you have the APOE4 gene, you are more likely to be diagnosed with Alzheimer’s. For another example, having the FOXO3 gene can keep you from getting a variety of diseases that generally come with old age.
Unfortunately, fewer than one in 100 people have these genes. Not surprisingly, fewer than one in 100 people live to 100.
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