你也许听过 “年龄取决于你的想法” 这句话，实际上，这句话或许有些道理。研究表明，我们对待衰老的态度会对我们能活多久以及晚年的健康状况产生影响。

When do you think 'middle age' starts? What about 'old age'? Unsurprisingly, the answer to these questions will depend on your culture, as well as how old you are when someone asks you. What is perhaps more surprising is that the answer to these questions could have an impact on how quickly your body begins to age.

In 2003, the researchers Hannah Kuper and Sir Michael Marmot carried out a wide-ranging study in which participants were asked the question: when does old age start? They then followed up with the participants six to nine years later and found that those who had thought old age began earlier were more likely to be in poor physical health.

But how could someone's answer to a question about age possibly have an impact on their health? It might be that the question prompts people to think about their physical health, underlying health issues or poor lifestyle, which might then make them feel that old age is coming sooner. People who say that old age sets in earlier, may also be more fatalistic and less likely to visit a doctor or to adopt healthier routines. It's even possible that the stress of having negative thoughts about ageing, contributes to more health problems.

So, this is what happens when we think negatively about ageing, but what happens when we think positively? People who think old age starts later, may be more conscious about their health and fitness and therefore take steps to stay in better shape. They may see their twilight years as an opportunity to learn new things and make new plans. If they believe they are younger, they therefore behave in younger ways, creating a virtuous circle. Whatever the reason, according to data from the Ohio Longitudinal Study of Ageing and Retirement, people who think positively about ageing live longer on average.

Of course, none of this research means that a positive attitude can magically stop the ageing process – our bodies get older with each passing year, after all. But it seems that if we try to be healthier and if we believe that there are still things we can do in old age, we might live longer and enjoy ourselves more too.