Using personalised avatars as an adjunct to a weight loss management programme: A feasibility study

Abstract

Abstract Background Obesity is a global public health concern. Interventions rely predominantly on managing dietary intake and/or increasing physical activity but sustained adherence is often poor. A lack motivation, self-efficacy and poor adherence to behavioural regimens are recognized barriers to successful weight loss. Avatar-based interventions have been found to achieve better patient outcomes managing chronic conditions by promoting more active engagement. We aimed to evaluate if a personalized avatar, as an adjunct to a routine weight-loss programme, could increase motivation, sustain engagement and improve health outcomes. Methods A feasibility randomised design. Participants were recruited from a community-based, 12-week NHS weight improvement programme. Main outcome measure was weight loss. Quantitative data were subjected to descriptive statistical tests and comparison between intervention/control arms. Acceptability was assessed through interviews and analysed using framework approach. Results 10 males (7-intervention; 3-routine); 33 females (23-intervention; 10-routine) were recruited. Initial mean weight was greater in intervention than routine arm (126.3 kg vs 122.9 kg); pattern of weight loss was similar across both arms in period T0-T1 but accelerated in period T1-T2 for intervention participants, suggesting that access to the personalized avatar may promote greater engagement with weight-loss initiatives in the short-to-medium term. Quality-of-life and self-efficacy measures demonstrated greater improvement in the intervention arm at both T1 (105.5 routine; 99.7 intervention) and T2 (100.1 routine; 81.2 intervention). N = 13 participants, n = 2 healthcare professionals were interviewed about their experience of using the avatar programme. Overall, participants found the intervention acceptable. Conclusions Avatar technology may successfully promote engagement and motivation in a weight-loss programmes, enabling participants to achieve greater weight-loss. Key messages The implementation of a personalised avatar as an adjunct to a weight management programme was both feasible and acceptable. Avatar technology may successfully promote engagement and motivation in weight loss programmes.