What is the origin of the idiom "have a good pair of lungs" and when to use it?

The idiom "have a good pair of lungs" originated from the association of lung capacity with the ability to produce loud and powerful vocalizations. It is an informal idiom used to describe someone who possesses strong vocal abilities or has a powerful singing voice. It can be used to praise a person's vocal abilities, indicating that they have a naturally loud or resonant voice that is well-suited for singing. The idiom can also be used figuratively to describe someone who is verbally expressive, articulate, or capable of delivering forceful or impactful speeches.