Table 2.

Baseline demographic characteristics of study subjects categorized by group

	EXCON (n = 8)	ED1 (n = 6)	ED2 (n = 12)	ED3 (n = 8)	P Value Group Effect
Demographics
Age, yr	20.5 ± 0.4	20.5 ± 0.8	20.2 ± 0.6	20.4 ± 0.7	0.989
Height, cm	165 ± 3.0	165 ± 3.0	164 ± 2.0	164 ± 2.0	0.945
Weight, kg	57.9 ± 2.2	56.4 ± 1.2	59.8 ± 1.2	59.8 ± 1.5	0.385
BMI, kg/m2	21.4 ± 1.3	20.7 ± 0.7	22.2 ± 0.5	22.4 ± 0.6	0.496
Body Composition
%Body fat	26.5 ± 2.4	27.4 ± 1.5	28.8 ± 1.0	29.6 ± 1.3	0.528
Fat mass, kg	15.6 ± 2.0	15.5 ± 1.2	17.3 ± 0.8	17.8 ± 1.5	0.511
Fat-free mass, kg	42.3 ± 1.0	40.9 ± 0.6	42.6 ± 1.0	42.1 ± 1.2	0.729
Reproductive Characteristics
Age at menarche, yr	12.3 ± 0.7	12.2 ± 0.2	11.9 ± 0.3	12 ± 1.0	0.949
Baseline cycle length, days	28.6 ± 0.9	27.8 ± 0.6	28.7 ± 0.5	30.2 ± 0.8	0.165
Training/diet characteristics
V̇o2peak, ml·kg−1·min−1	36.1 ± 1.4	38.4 ± 2.1	37.6 ± 1.4	38.1 ± 1.7	0.797
Baseline caloric intake, kcala	1,548 ± 195	2,150 ± 271	2,032 ± 154	1,881 ± 177	0.198
Energy Balance Parameters
RMR, kcal/24 h	1,205 ± 57	1,293 ± 27	1,285 ± 64	1,242 ± 62	0.732
Nonexercise PA, kcal/24 h	593 ± 64	576 ± 47	737 ± 68	623 ± 64	0.276
24-h Energy Expenditure, kcal	1,797 ± 92	1,870 ± 53	2,021 ± 105	1,865 ± 77	0.341

Values are expressed as means ± SE. EXCON, exercise controls; ED, energy deficit (groups 1–3); PA, physical activity.

^aData from 3-day diet logs.