Being a shy person myself, everyone is always urging me to break out of my comfort zone. Do something new! Do something unexpected! If you’re anything like me, you’ll agree that this is easier said than done.

You know that uncomfortable feeling you get when you hear sharp fingernails scrape down a blackboard? How about when you’re stuck on a 12-hour flight seated right next to a baby that’s been wailing for hours on end?

When it comes to healthy living, many people place their main focus on diet and exercise. But there’s a third factor many people overlook – and it could be what’s keeping you from optimal health.