2250 A mixed-method feasibility study of an intervention to reduce sedentary behaviour in community-dwelling older adults aged ≥ 75 years

Abstract Introduction Older adults are the fastest growing and most sedentary group in society. With sedentary behaviour associated with negative health outcomes, reducing sedentary time may improve overall wellbeing. This single-arm mixed-method feasibility study explored the acceptability of an intervention to reduce sedentary behaviour in community-dwelling older adults aged ≥75 years. Methods Participants were recruited from the Community Ageing Research 75+ Study (CARE75+) cohort, with factors such as age, frailty status, living arrangements and levels of sedentariness being considered. The intervention consisted of an educational booklet including advice on how to reduce sedentary behaviour, a smartwatch with a sedentary reminder function, educational group sessions and follow up phone calls. The 9-week intervention was conducted from June–August 2023. Reach, uptake, adherence, and adverse events were recorded, and the acceptability of the intervention was explored through semi-structured exit interviews. Results Of the 39 eligible participants, 10 consented (5 M:5F) and had a mean age 84.3 years. The intervention had an uptake and reach of 25.6%, and retention of 100%. No falls, hospitalisations or deaths occurred, and three cases of mild irritation were reported which resolved during the study. 100% adherence was observed for the group sessions and follow-up phone calls, and 65% for self-monitoring. Qualitative data suggests that participants were receptive of the intervention according to the domains of the Theoretical Framework of Acceptability, and suggestions were provided on refining the intervention components. Conclusion Strategies to reduce sedentary behaviour were tested on a diverse sample of community-dwelling older adults in the oldest old age group, with varying levels of sedentary behaviour and frailty status. The presented strategies appear to be acceptable, appropriate, safe, and high levels of adherence were observed. Participant feedback will be used to refine the intervention.