B Two new studies suggest that modern running shoes could increase the risk of i

B

Two new studies suggest that modern runningshoes could increase the risk of injuries to runners.

One study involved sixty-eight healthyyoung women and men who ran at least twenty-four kilometers a week. The runnerswere observed on a treadmill machine. Sometimes they wore running shoes. Othertimes they ran barefoot.

Researchers from the JKM TechnologiesCompany in Virginia, the University of Virginia and the University of Coloradodid the study.

They found that running shoes create morestress that could damage knees, hips and ankle joints than running barefoot.They observed that the effect was even greater than the effect reported earlierfor walking in high heels.

The study appeared in the officialscientific journal of the American Academy of Physical Medicine.

The other study appeared in the journalNature. It compared runners in the United States and Kenya. The researcherswere from Harvard University in Massachusetts, Moi University in Kenya and theUniversity of Glasgow in Scotland.

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

Runners who wear shoes usually come downheel first. That puts great force on the back of the foot. But the study foundthat barefoot runners generally land on the front or middle of their foot. Thatway 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 wearthem land on their heels. The heel of the shoe is bigger and heavier than otherparts of the shoe, so it would seem more likely to come

down first. Also, the heel generally hasthick material under it to soften landings.

60. How many organizations are involved inthe two studies?

A.Three.                         B.Four.                     C.Five.                     D. Six.

61. What can we learn from the text?

A. Most running shoes are designedimproperly.

B. The design of high heels is better thanthat of running shoes.

C. No one will run with running shoes inthe future.

D. Both of the studies are done in America.

62. Why do running shoes increase the riskof injuries to runners?

A. They could create stress. 

B. They’re too big and heavy.

C. They can affect the way the runnersland.   

D. Their heels can soften landings.

63. How did the researchers do the twostudies?

A. Bypractising.         B. Bycomparing.      C. By questioning.    D. By reasoning.

试题答案

【答案】

60—63 DACB  

【解析】略