What is the origin of the idiom "hale and hearty" and when to use it?

The idiom "hale and hearty" originated in Middle English, meaning "healthy" or "strong." It is used to describe someone who is in good physical condition and exhibits vitality and well-being. It can also convey a state of overall wellness, encompassing mental, emotional, and physical health. It is commonly used in informal contexts to express a positive and optimistic outlook on someone's health or well-being.