About FitnessNorms

Our Mission

FitnessNorms provides free, evidence-based fitness reference data to help you understand how your fitness metrics compare to others in your age and sex group. We believe everyone deserves access to high-quality health information without paywalls or advertising.

What We Offer

We present percentile-based fitness norms across a growing set of health metrics, including:

• VO2 Max - Cardiovascular fitness measured in ml/kg/min
• Resting Heart Rate - Cardiovascular health measured in beats per minute
• Max Heart Rate - Age-predicted maximum heart rate in beats per minute
• Grip Strength - Upper body strength measured in kilograms
• Body Fat Percentage - Body composition measured as a percentage
• Reaction Time - Neurological function measured in milliseconds

See all available metrics on our metrics index.

How to Use This Site

Each metric page shows percentile data broken down by age bracket (20-29, 30-39, etc.) and sex. Find your demographic group to see where your measurement falls on the distribution. Percentiles are rated as:

• Excellent (95th percentile) - Top 5% of the population
• Above Average (75th percentile) - Better than 75% of people
• Average (50th percentile) - Median value
• Below Average (25th percentile) - Better than 25% of people
• Poor (5th percentile) - Bottom 5% of the population

Some clinical and body-composition measurements (waist-to-height ratio, waist-to-hip ratio, body fat percentage, mid-upper arm circumference, Body Roundness Index, Conicity Index, and blood pressure) instead use neutral distribution labels (Very low, Low, Average, High, Very high). These labels describe only where a value sits in the reference population; they are not performance ratings or clinical classifications. For clinical measurements such as blood pressure, a value at either extreme may be medically significant, so the label is not a health judgment.

Data Sources

Data come from peer-reviewed studies, population surveys, authoritative technical reports, and documented analyses of open datasets. Every metric page identifies its source and links to a DOI, report, or dataset where available. Reference pages describe the study population, method, and known limitations, and the sample size where the source reports one. See our Methodology page for details on how we process and present this data.

Disclaimer

FitnessNorms is for informational purposes only and is not medical advice. Always consult with healthcare professionals before making decisions about your health or fitness regimen. Population norms provide context but don't account for individual circumstances, health conditions, or personal goals.