Table 3.

Physical Activity

Variable	Pre-COVID Cohorts, Baseline	Pre-COVID Cohorts, Week 12	P-value, Within Group Change	COVID Cohort, Baseline	COVID Cohort, Week 12	P-value, Within Group Change	P-value, Between Group Change
Sample size	N=55	N=47	N=47	N=25	N=22	N=21
Average stepping time min/d	95.4 ± 30.3	105.7 ± 31.4	0.005	90.4 ± 21.2	88.6 ± 31.5	0.72	0.09
Average number of steps/d	7733.3 ± 2657.5	8562.9 ± 2762.0	0.01	7383.3 ± 1973.4	7197.7 ± 3104.0	0.91	0.18
Average number of steps accumulated in stepping bouts with cadence > 75 steps/d	5164.5 ± 2307.5	5634.3 ± 2183.0	0.04	4815.0 ± 1696.5	4633.2 ± 2820.4	0.83	0.33
Average number of steps accumulated in stepping bouts with cadence > 100 steps/d	2582.7 ± 1999.9	2870.2 ± 1886.2	0.08	2506.3 ± 1685.4	2729.6 ± 2638.3	0.51	0.69
Average sitting time min/d	624.9 ± 88.9	622.2 ± 88.5	0.25	637.5 ± 98.4	635.2 ± 116.1	0.98	0.52
Average number of sitting bouts longer than 30 min/d	4.6 ± 1.5	4.3 ± 1.4	0.17	5.0 ± 1.4	6.1 ± 1.6	0.001	<0.001
Average number of sitting bouts longer than 60 min/d	1.1 ± 0.8	0.8 ± 0.7	0.03	1.2 ± 0.7	1.6 ± 0.7	0.11	0.001

Activity levels and postural changes were measured continuously over 7 days, 24h/day using the ActivPAL device at baseline and week 12. During COVID “stay-at-home” orders, study staff dropped off the ActivPAL device to the participants in the COVID cohort and instructed participants how to place the device on themselves. Study staff then picked up the devices at the end of the data collection period. All results reported as mean ± SD. Values in the table include all available data at each timepoint. The p-values reflect between group changes in the N=47 in the pre-COVID cohorts and N=21 in the COVID cohort that had valid PA data at both timepoints.