What is a good VO2max for my age?

For men aged 40–49, the average VO2max is around 36–40 mL/kg/min; for women the same age, 29–33 mL/kg/min. Elite endurance athletes often exceed 60–70 mL/kg/min. Even modest improvements from your personal baseline meaningfully reduce cardiovascular disease risk, regardless of where you currently stand.

How accurate is VO2max estimation from a 1-mile run?

The Rockport 1-mile walk/run formula has a standard error of ±3–4 mL/kg/min in healthy adults — comparable to submaximal lab tests. It is less accurate at fitness extremes. For most people tracking trends over time, the estimation is precise enough to be actionable and far more practical than a formal lab VO2max test.

What is Zone 2 training and why is it important?

Zone 2 is low-to-moderate intensity cardio (60–70% of heart rate reserve) where you can hold a conversation. It is the primary training zone for building aerobic base, improving mitochondrial density, and increasing fat oxidation efficiency.

How fast can I improve my VO2max?

With consistent Zone 2 training (3–4 sessions/week, 30–45 min), untrained individuals can improve VO2max by 15–20% over 8–12 weeks. The biggest improvements come from consistency and gradual volume increase over months.

Can strength training improve VO2max?

Resistance training alone improves VO2max modestly (~5%) in previously sedentary individuals. Combined aerobic and resistance training outperforms either in isolation for cardiovascular fitness. High-intensity circuit training with minimal rest can elevate heart rate into Zones 3–4, providing a meaningful aerobic stimulus alongside strength gains.

❤️Health

What Is My Cardio Fitness Score?

What does your VO2max say about your longevity?

What This Does

VO2max — the maximum amount of oxygen your body can use during intense exercise — is considered the single best predictor of long-term health. It predicts cardiovascular disease risk more accurately than blood pressure, cholesterol, or BMI. Increasing your VO2max by just 3.5 mL/kg/min reduces all-cause mortality risk by roughly 10–20%. The Cardio Fitness Score translates your estimated VO2max into a 0–100 score by comparing it to age-and-sex-matched normative data. You can estimate VO2max three ways: from your 1-mile run time (most accurate), from heart rate reserve using your resting and max heart rate (Karvonen method), or from self-reported fitness level. The calculator then gives you personalized heart rate training zones using the Karvonen formula, which accounts for your actual fitness level rather than the generic age-based estimates. You also get your biological fitness age, an 8-week projection showing how consistent Zone 2 training would improve your score, and specific insights based on your current weekly training volume.

When Should You Use This?

→You want to know your cardiovascular fitness level relative to your peers
→You are starting a cardio training program and want a baseline
→You want accurate heart rate zones instead of generic age-based estimates
→You are managing cardiovascular disease risk and want a fitness benchmark
→You want to track VO2max progress over a training cycle

Example Scenario

Diane, 47, runs a 10-minute mile, has a resting HR of 72, and does 120 minutes of cardio per week. Her estimated VO2max is 34 mL/kg/min, which scores 58 — Good for her age group. Her fitness age comes out at 44. The calculator flags that she is below the 150-min WHO weekly target and shows that adding just 2 more 30-min Zone 2 sessions per week could push her VO2max to 37+ over 12 weeks. Her personalized Zone 2 range is 119–138 bpm — significantly higher than the generic 120–130 bpm range she had been using.

Cardio Fitness Score

What Is My Cardio Fitness Level?

Estimate your VO2max, get a 0–100 cardio score, personalised HR training zones, and a 12-week improvement projection. Updates live as you change any input.

Updated 2026-03-16 · Samir Messaoudi · For informational purposes only — not medical advice.