-This paper presents a within-subject field test (n=24) with Flow platform, a smart cushion that uses interactive music to motivate office workers to break excessive sedentary time. In this study, we compared continuous music and interactive music as reminders to inform sedentary time by every 15-min. After each treatment, a questionnaire adapted from Flow State Scale was used to measure participants' experiences and thus motivations with interactive and non-interactive music. Moreover, a postinterview was conducted with every participant individually to gather insights on the challenges and opportunities for current design. This study examines if the interactivity as an additional factor could influence the music as a motivator to prevent sedentary behaviours among office workers. Our findings suggest a further design iteration to appropriate the concept more to the context of office.

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