Ratings for the intensity of your activity

• Very Hard: Barely possible to maintain; not able to talk
• Hard: Difficult to maintain; can say a few words
• Somewhat Hard: Breathing difficult; can say a sentence
• Somewhat Easy: Breathing noticeable; can talk with ease
• Easy: Breathing not noticeable; can talk with ease
• Very Easy: Anything other than sleeping

Exert yourself enough so that you can still talk, but not sing while you are being active.