Aim In this study, we investigated healthcare professionals' (HCPs) experiences with delivering home visits and digital coaching in the Face‐it health promotion intervention targeting women with recent GDM and their families. Understanding the acceptability and adoption of a health promotion intervention can provide insights into intervention fidelity and future scalability. Methods In total, 13 HCPs were interviewed. Data were analysed thematically through an abductive approach using Sekhon et al.'s theoretical framework of acceptability and Greenhalgh et al.'s framework for non‐adoption, abandonment, scale‐up, spread, and sustainability. Results Acceptability and adoption of the intervention among HCPs were influenced by (1) skills and technology, (2) values, and (3) organisation. The intervention was experienced as acceptable to HCPs because the dialogue tool, visualising different topics, used in the home visits and digital coaching through the LIVA app were flexible and enabled them to address psychosocial health and personalise goal setting in families. However, delivering asynchronous and non‐verbal communication was experienced as straining HCPs' relationship with families, which misaligned with HCPs' values. Establishing a non‐judgemental environment was needed to increase intervention acceptability among HCPs towards addressing type 2 diabetes risk after GDM. Increased collaboration between HCPs may have aligned advice and support to families and could have benefitted delivery. Conclusions When delivering health promotion to women with prior GDM, flexible intervention components that support psychosocial‐ and mental health topics may increase acceptability and adoption of the intervention among HCPs. HCPs' skills, values, and organisational factors should be considered prior and during implementation.

SummaryIn this systematic review and realist synthesis, we aimed to identify strategies to improve dietary and physical activity behaviors for parents with small children. A systematic literature search was conducted in MEDLINE, Embase, CINAHL, and PsycINFO in July 2021. Included studies had to: (i) target one or both parents with at least one child (0–3 years), (ii) aim to improve diet and physical activity, and (iii) report on diet and physical activity outcomes. Intervention context, delivery, and outcomes were extracted, and behavior change techniques were coded. A program theory was developed, and context‐mechanism‐outcome configurations were identified. In total, 17 interventions reported in 28 studies (19 effectiveness studies; nine protocols) were included. Nine interventions showed small improvements: in diet (n = 5), physical activity (n = 2), or both (n = 2) in mothers. The realist synthesis revealed three strategies to improve health behaviors: (1) using knowledge and role modelling to improve family dynamics, (2) providing various home‐based activities to change home environment, and (3) offering flexible delivery, for example, phone or website‐based to increase social support. Future interventions for parents with small children should consider involving the whole family, focusing on home‐based and practical components, and offering various delivery modes. The protocol for the systematic review and realist synthesis was registered in Research Registry (registration ID: reviewregistry860) March 30th, 2020.