Table 2. Maternal Parameters During Moderate-Intensity Exercise Sessions.

Variable	Non-Exercisers (n=15)	Regularly Active (n=15)	Highly Active (n=15)	P
Gestational age (wks)				.16
Mean ± standard deviation	31.7 ± 0.8	31.1 ± 1.2	31.1 ± 0.9
Median (range)	32.1 (30.1 – 32.9)	31.1 (29.4 – 32.9)	31.0 (29.4 – 32.4)
Average maternal heart rate (bpm)				.64
Mean ± standard deviation	121.7 ± 11.9	119.2 ± 7.0	118.7 ± 9.2
Median (range)	126 (104 – 139)	123 (104 – 128)	117 (107 – 138)
Percent of heart-rate reserve				.83
Mean ± standard deviation	51.2 ± 2.9	51.9 ± 2.9	51.1 ± 3.4
Median (range)	51 (47 – 56)	52 (48 – 57)	52 (43 – 55)
Rating of perceived exertion				.72
Mean ± standard deviation	2.7 ± 1.4	2.5 ± 0.6	2.6 ± 0.5
Median (range)	3.0 (1.0 – 6.0)	2.3 (1.5 – 4.0)	2.8 (2.0 – 3.3)