TABLE 3.

Sex-Specific Percentiles for CRF From Treadmill Exercise Tests With Measured V̇_O2max Obtained From FRIEND and Predicted V̇_O2max (mLO₂·kg ⁻¹·min⁻¹) Reported by the Cooper Clinic^13,a,b

Age group (y)	Percentile
	5th	10th	25th	50th	75th	90th	95th
Men from FRIENDc
20–29	29.0	32.1	40.1	48.0	55.2	61.8	66.3
30–39	27.2	30.2	35.9	42.4	49.2	56.5	59.8
40–49	24.2	26.8	31.9	37.8	45.0	52.1	55.6
50–59	20.9	22.8	27.1	32.6	39.7	45.6	50.7
60–69	17.4	19.8	23.7	28.2	34.5	40.3	43.0
70–79	16.3	17.1	20.4	24.4	30.4	36.6	39.7
Men from Cooper Clinicd
20–29	31.8	34.7	39.0	43.9	48.5	54.0	55.5
30–39	31.2	33.8	37.8	42.4	47.0	51.7	54.1
40–49	29.4	32.3	35.9	40.1	44.9	49.6	52.5
50–59	26.9	29.4	32.8	37.1	41.8	46.8	49.0
60–69	23.6	25.6	29.5	33.8	38.3	42.7	45.7
70–79	20.8	23.0	26.9	30.9	35.2	39.5	43.9
Women from FRIENDc
20–29	21.7	23.9	30.5	37.6	44.7	51.3	56.0
30–39	19.0	20.9	25.3	30.2	36.1	41.4	45.8
40–49	17.0	18.8	22.1	26.7	32.4	38.4	41.7
50–59	16.0	17.3	19.9	23.4	27.6	32.0	35.9
60–69	13.4	14.6	17.2	20.0	23.8	27.0	29.4
70–79	13.1	13.6	15.6	18.3	20.8	23.1	24.1
Women from Cooper Clinicd
20–29	27.6	29.5	33.0	37.8	42.4	46.8	49.6
30–39	25.9	28.0	32.0	36.7	41.0	45.3	47.4
40–49	25.1	26.6	30.2	34.5	38.6	43.1	45.3
50–59	23.0	24.6	28.0	31.4	35.2	38.8	41.0
60–69	21.8	23.0	25.1	28.8	32.3	35.9	37.8
70–79	19.6	21.5	24.2	27.6	29.8	32.5	37.2

^aCRF = cardiorespiratory fitness; CPX = cardiopulmonary exercise testing; FRIEND = Fitness Registry and the Importance of Exercise National Database; V̇_O2max = maximal oxygen uptake.

^bAll patients are considered free of known cardiovascular disease.

^cThe FRIEND CRF data were measured with CPX.

^dThe Cooper Clinic data reported were predicted from Balke test time or work rate.