Table 2.

Peak exercise results in each sex stratified by EFL.

	Females		Males
Mean ± SD	No EFL (N = 43)	EFL (N = 46)	No EFL (N = 18)	EFL (N = 41)
Age (years)	14.9 ± 2.0	14.7 ± 2.8	13.6 ± 3.5	13.7 ± 2.6
Height (cm)	163.4 ± 7.6	160.7 ± 12.1	165.7 ± 20.2	166.2 ± 15.6
Weight (kg)	58.3 ± 10.7	57.0 ± 13.4	59.5 ± 19.7	62.8 ± 19.9
BMI (kg⋅m2)	21.8 ± 3.5	21.8 ± 4.0	21.1 ± 4.6	22.3 ± 4.6
BSA (m2)	1.62 ± 0.16	1.59 ± 0.23	1.65 ± 0.37	1.69 ± 0.32
Work (W)	144 ± 37	160 ± 56	173 ± 70	185 ± 69
Work (%pred∗)	88 ± 23†	102 ± 24†	77 ± 19	90 ± 25
$\dot{V}{O}_2$ (mL⋅kg-1⋅min-1)	33.1 ± 6.1†	36.2 ± 7.5†	39.0 ± 7.3	39.5 ± 9.2
$\dot{V}{O}_2$ (%predicted∗)	89.5 ± 18.0	99.1 ± 19.4	85.4 ± 16.1	88.3 ± 17.5
HR (beat⋅min-1)	184 ± 14	185 ± 11	185 ± 15	185 ± 13
O2 pulse (mL⋅beat)	10.4 ± 2.3	11.1 ± 3.3	12.3 ± 41	13.2 ± 4.3
RR (breath⋅min-1)	47 ± 9‡	53 ± 9‡	55 ± 16	54 ± 9
VT (L)	1.55 ± 0.33	1.58 ± 0.52	1.75 ± 0.91	1.77 ± 0.66
${\dot{V}}_E$ (L⋅min-1)	69.7 ± 16.1	82.3 ± 25.0	84.5 ± 32.2	93.1 ± 34.6
${\dot{V}}_E$ /$\dot{V}{O}_2$	37.6 ± 5.9	40.2 ± 4.8	37.3 ± 5.8	38.1 ± 6.1
RER	1.15 ± 0.08	1.20 ± 09	1.16 ± 0.12	1.19 ± 0.10
PetCO2 (mmHg)	35 ± 4	34 ± 4	35 ± 4	36 ± 4

^∗Godfrey for Work Godfrey (1974) and Cooper et al. (1984). ^†p ≤ 0.006, ^‡p = 0.001, p = 0.01 (t-test).