Many of my coaching clients ask me to explain what "holistic health" means and why it is important. The easiest way I've found to explain it is to think about our health as a system in which no aspect is separate or distinct from another. In systems theory, you'll find a system described as a "configuration of parts connected and joined together by a web of relationships."*

What this means is that diet and exercise, although incredibly important, are just one part of the overall system. In...