4.1. Feasibility and Acceptability
RECRUITMENT, RECRUITMENT
Feasibility and acceptability of the intervention were supported by numerous indices, including participant recruitment and retention, results of the post-intervention satisfaction survey, and app use. Recruitment efforts yielded an enrollment rate of 7.5 women/month. Although comparison of this enrollment rate to other studies has limited utility due to the heterogeneity that exists across studies in regards to study populations, implementation settings, recruitment methods, and inclusion/exclusion criteria, this rate will be used to develop recruitment timelines for future intervention trials of the Participants expressed a high level of satisfaction for the multi-media modules, text message, and Fitbit components of the mHealth intervention, as well as for the intervention as a whole, with all participants who completed the intervention indicating they would recommend the smartphone-delivered PA intervention to a friend. These satisfaction results mirror those of an earlier iteration of the structured PA intervention (i.e., delivered through Facebook and text messages) [App use and Fitbit wear data revealed that engagement was high during the initial weeks of the intervention, but declined gradually over the course of the intervention. Although decreased engagement over time is commonly reported in e- and mHealth interventions [