There was an old man about 85 years old in very robust health. Newspaper and television journalists came on his birthday to interview him about the secret of long life. So he said, "Oh, no problem, I just walk about five miles every day, and then I do some bicycling and swimming whenever I like. But walking is a basic routine in my life; I make it a point to walk five miles a day, every morning." But one of the journalist was very skeptical, said, "My father also walked five miles every day but he died at fifty." So the old man said, "Now then, he didn't do it long enough, that's why."

有一个老人，大概八十五岁左右，身体很硬朗。他生日那天，报纸、电视记者都来采访，请教他长寿的秘诀。他回答说：「也没什么！我只不过每天走五里路，有的时候骑骑脚踏车、游游泳而已。不过走路是固定的，每天早上一定要走五里路才行。」

　有一个记者觉得很怀疑，就问道：「咦！我爸爸每天也走五里路，可是他五十岁就去世了！」老人回答说：「那就是因为他运动得不够久才这样。」

意思说他应该要运动到八十五岁才能长寿！。