Table 1:

Characteristics of the Study Population (n=272)

	Median or % (IQR)
Age (years)	32.5 (27 – 39)
Gender (Female)	70%
Race
White	69%
Black	15%
Asian	9%
Hispanic	2%
Height (cm)	169 (164 – 176)
Weight (kg)	72 (61 – 84)
BMI (kg/m2)	24.9 (21.8 – 27.9)
Ever smoker	11%
Current smoker	0%
Exercise days per week*
0	13%
1 – 2	29%
3 – 5	44%
6 – 7	13%
mHealth device †	49%
Daily step count	7500 (5413 – 10,000)
Resting HR	75 (67 – 85)
Resting SPO2	98% (98 – 99)
Post-test heart rate	120 (103 – 138)
ΔHeart rate (post-test – resting)	43 (27 – 59)
Percent of Maximum heart rate achieved‡	64% (55% – 74%)
Post-test SPO2	98% (98 – 99)
Six-minute walk distance (m)	637 (584 – 686)

^*Self-reported “Aerobic or lower body exercise for greater than 20 minutes”

^†Includes wearable fitness device or smart phone with step counter

^‡Maximum heart rate = 220 – age