We humans need to exercise in order to stay healthy. Exercise protects against disease and early death, and keeps us mobile and able to perform daily tasks.
원문출처 : https://www.cnn.com/2018/05/14/health/walking-exercise-partner/index.html
원문출처 : https://www.cnn.com/2018/05/14/health/walking-exercise-partner/index.html