Air pollution poses significant health, social, and economic risks, necessitating effective communication to promote awareness and behavioural adaptation. This study explores how combining behavioural and science communication strategies shapes stakeholder participation in co-designing air quality (AQ) communication technologies and how stakeholders engage with, represent and negotiate environmental data and issues. Data was collected across 11 workshops involving 169 participants of different ages, combining education, storytelling, user testing and participatory design to foster learning and dialogue. Findings highlight that AQ communication is entangled with questions of data usability, trust and environmental literacy. Participants emphasised the importance of audience-specific AQ messaging, integrating AQ technical data with comprehensible visualisations, and combining persuasive communication with evidence-based information. Tensions emerged between individual adaptive behaviours and structural barriers, reinforcing the socio-ecological complexity of AQ communication. Challenges included involving underrepresented groups and assessing long-term impacts of interventions. The findings offer insights into how public engagement can be utilised to inform the design of an AQ communication technology to support protective and sustainable behaviours. Future research should explore ways to enhance inclusivity, refine message design for different user groups, and assess the impact of participatory AQ communication initiatives.

eHealth coaching is a promising approach for delivering effective, person-centered, digital health interventions. Yet, the way eHealth coaches ‘tailor’ interventions using technology is currently unclear. This study aims to understand how eHealth coaches tailor support to clients seeking to lose weight. Nine in-depth interviews with eHealth coaches were conducted. The data were analyzed using thematic analysis, deriving three themes: ‘Understanding the client,’ ‘Adapting Support,’ and ‘Navigating challenges.’ Coaches used both assessment tools and their growing relationship to understand client's needs. Coaches adapted the pace and nature of educational content, utilized their clients' preferred technologies, and adopted different personas to meet the needs of each individual. Providing tailored support also presented challenges for eHealth coaches, with technology eroding personal and professional boundaries. Our work interrogates what it means to ‘tailor’ support, through exploring coaching as a humanistic approach to behaviour change, with implications for the design of person-centered digital coaching interventions/systems.

Online health communities provide a space where people seek out and provide support for weight loss activities, including tracking. Our study examined the experiences of members of an online community (r/loseit on Reddit.com) who posted about using digital tracking tools for weight loss. A targeted search garnered 379 public posts, which were analyzed using Thematic Analysis. Four themes reflected members’ individual and shared experiences: Tracking as gaining insight, Tracking as a vehicle of control, Confronting challenges in sustaining tracking and Teaching and learning the skills of tracking. We highlight complex socio-technical processes that members developed around tracking tools and discuss how knowledge of these appropriations can be applied to designing future user-centered tracking tools to support weight loss. We discuss how the social context of an online health community can shape both the usage of tracking tools and self-regulatory processes for health behaviour change.