popular ways to stay healthy.There is，however，a more humble exercise that might not be so attractive，but has all the benefits－walking.

　　Certified fitness professional Jolynn Jaekel explains，"What I love about walking is that anyone can do it at any age and any fitness level.Plus，it is good for your heart，your head and your wallet."

　　A recent report details the health benefits of walking.The report found that walking regularly to fulfill the 150 minutes of moderate physical exercise every week，recommended by the UK's chief medical officer，could save 37,000 lives each year.Scientists at the Lawrence Berkeley National Laboratory in California found that quick walking reduces the risk of heart disease more effectively than running.They observed participants aged between 18 and 80 over a six­year period and found that walking reduced the risk of heart disease by 9.3%，while running reduced it by 4.5%.And there is even more good news: 30 minutes of quick walking over five days could help you sleep easily，according to research by Oregon State University.The study by the university showed that walking helped participants sleep better and feel more alert during the day.The sooner you get started，the sooner you'll notice the differences in your mind and body.So，go out for your 30­minute walk in a nearby park or green space.

　　【语篇解读】　本文主要介绍了健康生活方式中的最简单有效的方式--步行。

　　1．The underlined word "humble" in the first paragraph probably means " "．

　　A．plain　　　　　　　　B．relaxing

　　C．popular D．active

　　A　[词义猜测题。根据第一段可知，当提到保持健康的方式时首先可以想到普拉提、瑜伽和跑步机。然而，有一种不太引人注目的简单运动却让人受益匪浅，那就是步行。由此可推知，画线词和"plain"意义相近。故A项正确。]

　　2．What does Jolynn Jaekel think of walking?

A．It's loved by people of all ages.