Oxygen Consumption at 30 W of Exercise Is Surrogate for Peak Oxygen Consumption in Evaluation of Cardiorespiratory Fitness in Young-Adult African-American Females

Table 1

Descriptive characteristics of the study subjects.

Variables	Subjects (𝑛 = 42)
Age (yr)	20.7 ± 2.2
Height (cm)	165.3 ± 7.9
Weight (kg)	68.4 ± 11.7
VO2peak (mL·kg^−1·min^−1)	26.4 ± 3.9
HRpeak (beats·min^−1)	182.3 ± 12.3
VO2@30 W (mL·kg^−1·min^−1)	11.2 ± 2.2
HR@30 W (beats·min^−1)	80.9 ± 12.3
Systolic pressure at 30 W (mm Hg)	119.0 ± 2.8
Diastolic pressure at 30 W (mm Hg)	76.8 ± 2.2
Rate-pressure product at 30 W (bpm·mm Hg)	9,445 ± 1,589

HR_peak: peak heart rate; VO_2peak: peak oxygen consumption. HR_@30 W: heart rate during exercise at the submaximal workload of 30 W; VO_2@30 W: oxygen consumption during exercise at the submaximal workload of aerobic exercise. Systolic pressure, diastolic pressure, and rate-pressure product at 30 W = systolic blood pressure, diastolic blood pressure, and heart rate × systolic pressure product during exercise at the fixed workload of 30 W. Data are means ± standard deviations.