In my language we say in daily life to health person "how do you feel? " it has the same meaning as in English phrase "how are you? ", but it's just more warmhearted.
In English I'm not sure if it's used the same, and if it's possible to use this phrase between friends who feel well, and just want use it in meaning of "how are you" in more warmhearted way, or it's used in English only when the doctor or other care-providers ask the patient about his health.