运动可使免疫系统年轻化 Study finds exercise helps keep immune system young

A newly published(新发表的) study(研究) finds(发现) that exercising(锻炼) in older age can help keep(保持) one's immune system(免疫系统) active(活跃) and young(年轻).

Researchers in Britain followed(跟踪) 125 cyclists(骑行者) over the age of 55 and found that they had immune systems of 20-year-olds.

The researchers found these cyclists have higher levels of freshly made T-cells, which play an important role(角色) in one's immune response(响应), such as recognizing(识别) and killing(杀死) foreign invaders.

Professor Janet Lord, director of the Institute of Inflammation and Ageing at the University of Birmingham and a co-author of the study, said "the immune system declines(减少) by about 2-3 percent a year from our 20s, which is why older people are more susceptible to infections(感染), conditions like rheumatoid arthritis(类风湿性关节炎) and, potentially, cancer(癌症)."

The research was published in the journal Aging Cell.

词汇 Words:

[yán jīu] 研究 study
[duàn liàn] 锻炼 exercise
[xiǎng yìng] 响应 response
[gǎn rǎn] 感染 infection
[fā xiàn] 发现 find
[bǎo chí] 保持 keep
[gēn zōng] 跟踪 follow
[shí bié] 识别 recognize
[jiǎn shǎo] 减少 decline
[ái zhèng] 癌症 cancer

重点词汇 Key word:

锻炼 <动词 v.> 

• Take exercise; have physical training
  E.g. Rúguǒ nǐ bù duō duànliàn,jiù huì fāpàng。
  如果你不多锻炼,就会发胖。
  If you don't take more exercise, you'll get fat.

• Steel; toughen
  E.g. Yòng zhègè zhìlì yóuxì duànliàn nǐ de sīwéi nénglì。
  用这个智力游戏锻炼你的思维能力。
  Stretch your brain with this puzzle.