Cardiorespiratory Fitness Norms (VO2max)

A VO2max value is only meaningful against age- and sex-specific norms. The most widely used are the Cooper Institute / ACSM percentile tables (published in ACSM's Guidelines), which sort VO2max (mL·kg⁻¹·min⁻¹) into categories — commonly Very Poor, Poor, Fair, Good, Excellent, Superior — by decade of age and by sex. VO2max declines with age (~1% per year after ~25–30 in untrained adults) and is on average higher in males (larger heart, more lean mass, higher hemoglobin).

Illustrative reference ranges (men, mL·kg⁻¹·min⁻¹; "good"–"excellent" band): (use current Cooper Institute/ACSM percentile tables for exact cutoffs)

Women's category cutoffs run roughly 6–10 mL·kg⁻¹·min⁻¹ lower at each age. Endurance athletes commonly reach 60–85; elite cross-country skiers/cyclists are the highest recorded. Below ~17.5 mL·kg⁻¹·min⁻¹ (≈5 METs) independence and exercise tolerance become impaired in older adults.

Use: report the category and percentile, not just the number; re-test with the same protocol to judge change against measurement error (~±10–15% for estimates).

• Norms are age- and sex-specific (Cooper Institute / ACSM percentile tables): Very Poor → Superior.
• VO2max declines ~1%/yr after ~25–30 in the untrained; women's cutoffs ~6–10 mL·kg⁻¹·min⁻¹ below men's per age.
• Endurance athletes: ~60–85 mL·kg⁻¹·min⁻¹.
• Exact category numbers must come from the current published tables (flagged for verification).
• Re-test with the same method; estimate error ~±10–15%.

• vo2max-overview / vo2max-direct — produce the score being rated.
• field-run-tests — common source of the estimate.
• interpreting-results — turning a category into action.
• mets — METs equivalent for context.