An interesting question Laura. I will attempt an answer of shortness. Most who know me know I practice in the answer section writing seeking less for more. With this answer I share I differ "Healthy" with "Well." Some say synonymous, yet for me 'tis not.
I tend to lump healthy into the physical element within the six elements of wellness I prefer to follow. Sharing is I am not always a great follower said with a smile. I include mental with physical. I use as a guide the Six Dimensions of Wellness of the National Wellness Institute today. I use to use something from a Health / Wellness class from an excursion going back to finish a college degree around 2000 - 2003. They taught a 10 point system. Too many to remember today at my age said with a giggle with others, maybe.
Also, having a poetic mind at times, I like to think metaphorically and with allegorical views seeking compare and contrast for learning. Or, having been in the automotive field for a career lifestyle including the high performance industry allegorically I compare a healthy engine with a healthy body. Works for me.
The vehicle of a car, let's say is a family car, a performance cruiser, a high performance restored hot rod of nostalgia (hint, hint), or even a race car has systems, thus the six elements of wellness. A healthy engine to me means the engine or the actual mechanical portion, the air induction system, the exhaust or waste system, the fuel system, and of course the ignition or computer system today for the engine as a whole. Systems within the element of the physical.
Today's on-board computer for everyday cars since, say, the early 90's is probably ten times more sophisticated than the on-board computer of the Apollo Series capsules that went to the moon. For me, I ponder with this allegory the on-board computer system for physical wellness. Or, the brain as a healthy organ. The mind is different. A whole new subject. Just for interest, did you know a car actually kinda' does fly?
The National Wellness Institute considers emotional wellness as a different element. Again, the mind, well, as being healthy or not, with this allegory is not the physical, or the brain, nor is it the element of emotional wellness. Different altogether . . . ponder . . .
With the allegory, well, my engine is a little worn out. Genes are Levi's, environment is natural gardening, and lifestyle is changing today. Or, Restoration for this next year . . . Ponder the hint, hint . . .