Full text View on content provider's site.Trial RegistrationInternational Standard Randomized Controlled Trial Number (ISRCTN): 55259451 (Archived by WebCite at ) Future research should prioritize further development of the app to maximize usability and test effects of the intervention independent of quit-smoking programs. However, problems with usability and lack of effects on abstinence raise questions over the app’s long-term effectiveness. ConclusionsThe PhoS app showed some potential to reduce abstinence among participants not using pharmacological therapy and to increase physical activity. Results revealed that the app resulted in better retention. Participants receiving the app reported greater levels of physical activity than those who did not. However, participants receiving the app were more likely to report greater abstinence if they did not use pharmacological support, while those who did not receive the app reported greater abstinence when using pharmacological support. Participants receiving the PhoS app did not report greater abstinence than those who did not receive the app. ResultsSome participants reported that the PhoS app was useful in assisting them to successfully manage their cigarette cravings, although compliance across the sample was modest and participants reported low levels of usability. Participants in the comparison condition were provided with generalized relapse prevention training. Participants in the intervention group were provided with the PhoS app and training on how to use it to assist with relapse prevention. After quit day, participants were randomly allocated to an intervention (n=25) or to a comparison (n=19) group. MethodsRegular smokers (n=44) attended a group-based behavioral counselling program aimed at promoting physical activity as an additional aid to quit. The app was designed to prompt smokers to engage in physical activities to manage their smoking cravings. ObjectiveWe aimed to test the feasibility, acceptability, usability, and preliminary efficacy of an mHealth mobile phone app, Physical activity over Smoking (PhoS), to assist smokers in quitting smoking in a randomized controlled trial. Software and apps on mobile phone and handheld devices offer an opportunity to communicate messages on how to use physical activity to manage cravings as part of quit-smoking programs. Physical activity has been proposed as one means to help smokers manage cravings. Relapse rates among smokers engaged in quit-smoking programs are high.
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