Metabolic Energy Correlates of Heart Rate Variability Spectral Power Associated with a 900-Calorie Challenge

Table 1

Control measurements.

Variable	Mean ± SD
Age (y)	19 ± 1.0
Body Temperature °F	97 ± 0.7
Body mass index	26 ± 7
Body fat (%)	22 ± 12
Respiratory quotient	0.9 ± 0.2
Oxygen consumption (mL·min^−1)	294 ± 64
Energy expenditure (Cal·min^−1)	1.4 ± 0.3
Systolic blood pressure (Torr)	128 ± 13
Diastolic blood pressure (Torr)	70 ± 9
HRV measurements
Standard deviation of RR intervals (ms)	89 ± 35
Total spectral power (ms^2 × 10^3)	10 ± 9
Very-low-frequency spectral power (ms^2 × 10^3)	2 ± 4
Low-frequency spectral power normalized (nu)	32 ± 17
High-frequency spectral power normalized (nu)	64 ± 16
Low-frequency · high-frequency^−1 spectral power	0.5 ± 1.0