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VO2max is a para­metric measure of a person’s cardio­respira­tory capacity or aerobic fitness (measuring VO2max). The tables below categorize relative VO2max scores for adult men and women of various ages. These scores are in units of milliliters of oxygen per kilogram of body weight per minute (ml/kg-1/min-1). Note that women average 4–5 milliliters less than men. Follow this external link for online VO2max calculators.

Maximal Oxygen Uptake Norms For Men (ml/kg/min)

  Age (years)  
Rating 18–25 26–35 36–45 46–55 56–65 65+
Excellent > 60 > 56 > 51 > 45 > 41 > 37
Good 52–60 49–56 43–51 39–45 36–41 33–37
Above Average 47–51 43–48 39–42 36–38 32–35 29–32
Average 42–46 40–42 35–38 32–35 30–31 26–28
Below Average 37–41 35–39 31–34 29–31 26–29 22–25
Poor 30–36 30–34 26–30 25–28 22–25 20–21
Very Poor < 30 < 30 < 26 < 25 < 22 < 20

Maximal Oxygen Uptake Norms For Women (ml/kg/min)

  Age (years)  
Rating 18–25 26–35 36–45 46–55 56–65 65+
Excellent > 56 > 52 > 45 > 40 > 37 > 32
Good 47–56 45–52 38–45 34–40 32–37 28–32
Above average 42–46 39–44 34–37 31–33 28–31 25–27
Average 38–41 35–38 31–33 28–30 25–27 22–24
Below Average 33–37 31–34 27–30 25–27 22–24 19–21
Poor 28–32 26–30 22–26 20–24 18–21 17–18
Very Poor < 28 < 26 < 22 < 20 < 18 < 17

Source: These norms have been derived from several now unknown sources.