The brain and central nervous system job is to control function and coordinate other systems of the body. The brain sends a signal down to the body to all organs and systems of the body, and then you have nerves that send signals back up to the brain to let it know whats going on so it can send the right signals back down.
If this communication process is broken somehow someway from interference, i.e. vertebrae pinching or inflaming a nerve, it puts you into a less than functional state and leads to a less adaptive state of well-being. Your body is not at 100 percent and function is lost.
Your muscles are in spasm
You have numbness and tingling down your arms and legs
Your thyroid gland is not producing
Your heart rate is always high
Wellness is not waiting for symptoms
it is taking the necessary steps to prevent those symptoms
so you can function at 100% and be symptom free