Athletes typically push themselves beyond barriers and past personal limits. And for competitive climbers, the force they defy is Earth's gravity itself.
원문출처 : http://www.cnn.com/2017/11/10/health/edinburgh-climbing-fit-nation/index.html
원문출처 : http://www.cnn.com/2017/11/10/health/edinburgh-climbing-fit-nation/index.html