If you are in your 40s or 50s, chances are that you are starting to notice some changes in your body, including muscle loss and diminishing strength, even if you exercise fairly regularly.
원문출처 : https://www.cnn.com/2018/03/06/health/muscle-age-exercise-jampolis/index.html
원문출처 : https://www.cnn.com/2018/03/06/health/muscle-age-exercise-jampolis/index.html