A value around 19.4 mL/kg/min is typical (50th percentile) for females in this age group.
Scores above about 23.1 mL/kg/min fall near the 75th percentile or higher, indicating above-average performance. Scores below about 16.4 mL/kg/min fall near the 25th percentile; about 75% of the reference population scored higher.
Reference population:Apparently healthy US adults aged 20-89 who completed treadmill or cycle cardiopulmonary exercise testing at 34 contributing laboratories