When you get on the bus, do you ever smile at the driver?Perhaps few of us do.But according to a new study in London,this simple act can(increase) the driver's happiness.The researchers hope that the findings will lead to "more friendliness on buses."
It is hard (believe) that a study on London's buses could change behavior worldwide. However, this has happened before.In the history of medical science, London's double-deckers once played important role.Every time you go for a run or check your step count, you are actually "following the path"of the conductors on these buses.
In the 1940s, doctors were worried. Many rich countries were suffering from an"epidemic(疾病大流行)"of heart disease. No one knew why. that time, people didn't think that health and exercise were linked.Some even(feel) that too much physical activity was a bad thing. After all, soldiers and farmers had to do a lot of "exercise" everyday.,they suffered from various diseases.Some of(they) died young.
Then, Jerry Morris, a young doctor, focused on the medicalrecords of 31,000 London transportation workers.The findings were (surprise).Conductors who ran up and down stairs all day were about 30 percent less likely to get heart disease than drivers who sat all day. Exercise was keeping people (health). Morris also looked at other jobs. Similarly, postmen were much less likely to suffer from the disease than operators.
Morris's research was published in 1953. More and more people around the world then took up (run).
Do you think more people will now smile at the driver when they get on the bus?
