Supporting Physical Activity in Pregnancy

Abstract

Physical activity is considered a key therapy for reducing obstetric complications, yet more than 3 in 4 individuals fail to meet physical activity recommendations during pregnancy (Gaston & Vamos, 2012). Differing approaches to physical activity counseling have been implemented to address this issue (Pearce et al., 2013). This study aimed to investigate the effect of one such counseling method, termed motivational interviewing (MI; Miller & Rollnick, 2013). It involved two approaches for communicating physical activity information – a guiding style embodying the autonomy-supportive mindset of MI, or a directing style involving specific advice and recommendations. Each of these approaches was depicted through a written vignette, showcasing a consult between an exercise professional and a pregnant client. Based on random assignment, participants (N = 123) read one of the two vignettes, then indicated the vignette client’s physical activity level for three time points post-consult. Participants assigned to the guiding style (n = 56) reported higher scores on the six manipulation check items compared to those assigned to the directing style (n = 67). While the mixed model ANOVA demonstrated no significant group × time interaction effect, the analysis revealed a significant main effect of group and time on physical activity levels. Specifically, those in the guiding style condition reported more physical activity on average than those in the directing style condition, with levels decreasing over time in both groups. In sum, a guiding communication style, generated in accordance with MI-based evidence, shows promise for improving prenatal physical activity levels and merits further investigation.