Ways of (Not) Seeing: An Exploratory Study on the Influence of Genre on Memory Narratives

We assessed reliability and validity of three physical activity (PA) measures during pregnancy and postpartum: SenseWear Armband (SA; kcal/kg/hr), Omron pedometer (PED; steps/day/hr), and Pregnancy Physical Activity Questionnaire (PPAQ; MET.hr/ wk). Participants (n = 20) wore SA and PED in freeliving environments for two weeks at 20 weeks gestation, 32 weeks gestation, and 12 weeks postpartum, and completed the PPAQ to evaluate PA. Intraclass correlation coefficients (ICCs) and standard errors of measurement (SEM) were calculated to estimate reliability. Convergent validity among the modalities was assessed using Pearson correlations. PA was 13.3 ± 3.7 kcal/kg/hr, 497 ± 192 steps/day/hr, and 15853 ± 5702 MET.hr/wk. Reliability (ICC:SEM) of SA was lower than PED and PPAQ at all time points (20 weeks = (0.55:1.3), 32 weeks = (0.42:1.2), postpartum = (0.19:2.8)). While PED reliability was (0.42:126), (0.89:53), and (0.86:93), PPAQ was more reliable across both pregnancy time points (0.88:3867) and (0.83:3820) than postpartum (0.57:5592). Validity estimates were low and variable (r = −0.37-0.30). Overall, results showed acceptable reliability but poor validity in our free-living environment study of PA during pregnancy and postpartum.