Balance is everything in life, in my opinion, but it is a particularly important principle where health and fitness is concerned.
In this context, getting the balance right between diet, exercise, mental health, rest and other interests is essential in living an energetic and meaningful life. Where diet and fitness is concerned this balancing of nutrition and exercise is crucial.
As such, I like this article from Coach Magazine, which concerns balancing healthy foods to achieve a stronger self and immunity.
Get the balance right, as I believe Depeche Mode put it in song.