What is the origin of the idiom "second wind" and when to use it?

The idiom "second wind" originated from the world of sailing, where it referred to a sudden burst of wind that propels a ship forward after a period of calm. However, It can also be used metaphorically to express a renewed sense of ease or comfort in breathing after a period of exertion, such as during exercise or physical activity. It is generally used in informal or figurative language.