If you're wondering how to stick with your favorite workout but make it more intense, the "talk test" might be your answer.
원문출처 : https://www.cnn.com/2022/04/26/health/talk-test-exercise-intensity-cdc-wellness/index.html
원문출처 : https://www.cnn.com/2022/04/26/health/talk-test-exercise-intensity-cdc-wellness/index.html