What is mental fitness? It's a new concept in health called mental fitness. It's the percentage of time your mind is serving you versus sabotaging you. Independent researchers have validated the PQ (Positive Intelligence Quotient)  Score to be the single greatest predictor of how much of your potential for both success and happiness you achieve. Research has shown that higher PQ results in enhanced immune system functioning, lower levels of stress-related hormones, lower blood pressure, less pain, fewer, colds, better sleep in a smaller likelihood of having hypertension, diabetes, or strokes. What Is Mental Fitness? Stanford lecturer and best-selling author Shirzad Chamine has developed a program and book…