When I think about what it means to be healthy, I think of a young child or an animal like a dog or a cat. Once they wake up, their energy level is such that they can be called on to do most any kind of playful physical exertion at any time, for long stretches of the day interrupted only by very brief periods of resting or napping (well, one good long afternoon nap for a human, I suppose). If you drag your ass for more than 5 minutes after waking up, and/or are completely useless after supper, then you could stand to be healthier.
You lousy kids! Get off my savannah!