They divided the runners into three groups. One group had always run shoeless. Another group had always run with shoes. And the third group had changed to shoeless running.

　　Runners who wear shoes usually come down heel first. That puts great force on the back of the foot. But the study found that barefoot runners generally land on the front or middle of their foot. That way they ease into their landing and avoid striking their heel.

　　Harvard’s Daniel Lieberman led the study. He says the way most running shoes are designed may explain why those who wear them land on their heels. The heel of the shoe is bigger and heavier than other parts of the shoe, so it would seem more likely to come down first. Also, the heel generally has thick material under it to soften landings.

　　But the researchers do not suggest that runners immediately start running barefoot. They say it takes some training. And there can be risks, like running when your feet are too cold to feel if you get injured.

　　The study was partly supported by Vibram, which makes a kind of footwear that it says is like running barefoot. The findings have gotten a lot of attention. But the researchers say there are many problems in the way the press has reported in their paper. So they have tried to explain their findings on a Harvard Website.

　　1. What’s the main idea of the passage?

　　A. Walking in high heels could cause less serious effects than running barefoot.

【2017届高考英语一轮复习夯实练习：必修4U3《A taste of English humour》（新人教版含解析）】相关文章：

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习短文改错专题训练：考法2 句法错误（含解析）

★ 北京市2014高考英语一轮复习 练习手册（31）选修7 Unit 1 Living well（含解析）新人教版

★ 2014届高考英语一轮复习课时作业(三十六)选修6Module 6《War and Peace》（外研版）

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（5）模块2 《Unit 5 Rhythm》（含解析） 北师大版必修1

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习书面表达专题训练：技法7 画龙点睛的结束语（含解析）

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练：8（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修4 unit1《Women of achievement》

★ 2014届高考英语一轮复习课时作业(四十四)选修8Module 2《The Renaissance》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit4《Earthquakes》

★ 2014届高考英语一轮复习课时作业(十九)必修4Module 1《Life in the Future》（外研版）