Fitness versus Fatness and Insulin Resistance in U.S. Adolescents

Table 1

Characteristics of the study sample by gender.

Parameter	Boys (n = 573) (mean ± SEM)	Girls (n = 505) (mean ± SEM)	All (N = 1078) (mean ± SEM)
Age (yr)	15.14 ± 0.07	14.92 ± 0.13	15.03 ± 0.08
BMI (kg$·$m^-2)	22.72 ± 0.30	22.58 ± 0.33	22.65 ± 0.24
Waist circumference (cm)	79.99 ± 0.79	77.95 ± 0.91	78.99 ± 0.68
VO2max (mL$·$kg^-1$·$min^-1)	47.4 ± 0.64*	39.59 ± 0.44	43.57 ± 0.52
HOMA	2.83 ± 0.11	2.92 ± 0.11	2.87 ± 0.07
Obesity status (%)
Normal weight	67	73	70
Overweight/obese	33	27	30

BMI: body mass index; *P <.01 boys versus girls.