Table 2.

Physical activity recorded by accelerometry at 12 and 36 wk of gestation by group and overall

Variable	Overall n = 80	Control n = 40	Exercise n = 40
12 wk (n = 80)
Steps, steps/day	6,631 ± 2,152	6,417 ± 2,239	6,845 ± 2,039
Sedentary time, min/day	1,065 ± 88	1,078 ± 81	1,052 ± 92
Light activity time, min/day	198 ± 52	190 ± 34	206 ± 64
Moderate activity time, min/day	174 ± 54	170 ± 56	179 ± 53
Vigorous activity time, min/day	3 ± 3	2 ± 3	3 ± 3
36 wk (n = 73)
Steps, steps/day	6,378 ± 2205	5,522 ± 2,082	7,145 ± 2,023‡,*
Sedentary time, min/day	1,072 ± 94	1,097 ± 102	1,049 ± 79¥,†
Light activity time, min/day	198 ± 56	194 ± 69	202 ± 42
Moderate activity time, min/day	167 ± 53	147 ± 54	185 ± 45‡,*
Vigorous activity time, min/day	3 ± 3	2 ± 2	3 ± 3¥,†
Change over time (n = 73)
Steps, steps/day	−320.8 ± 365.4	−1,044 ± 379	345 ± 321¥
Sedentary time, min/day	9 ± 15	19 ± 17	−0.2 ± 13
Light activity time, min/day	−1 ± 10	4 ± 11	−6 ± 8
Moderate activity time, min/day	−8 ± 9	−23 ± 10	5 ± 8¥
Vigorous activity time, min/day	0.2 ± 0.6	−0.2 ± 0.4	1 ± 1

Means ± SD. Student’s t-tests were used to compare groups and time points.‡P < 0.001 vs. control; ¥P < 0.05 vs. control; *P < 0.001 vs. 12 wk; †P < 0.05 vs. 12 wk.