Normal vs. Healthy: Why They Are Not the Same

Normal = statistical average/typical range for a population.
Healthy = optimal physical, mental, and social well-being (WHO definition).

Key Divergences

Parameter	Normal Range	Healthier Target
Blood pressure	120/80–140/90 mmHg	<120/80 mmHg (lower CVD risk)
BMI	18.5–24.9	20–23 + high muscle, low visceral fat
Fasting glucose	<100 mg/dL	<90 mg/dL (lower diabetes risk)
Sleep	6–7 hrs (population avg)	7–9 hrs (physiological need)

Examples

• Normal but unhealthy: Age-related weight gain, "normal" BP that rises with age.
• Healthy but not normal: Athlete's low HR (40s), low BP, high CK.

Takeaway

Population norms reflect current (often unhealthy) averages. Health targets reflect physiological optimum. Individualize with clinician.