Background: Primary health care centres (PHCCs) are the first contact for all people with health-related problems, with the exception of emergency care. The mission of PHCC is to provide tailored, person-centred care where unhealthy lifestyle habits need to be addressed as they affect today's most common non-communicable diseases that cause death and illness. The Act in Time project supported staff and managers at PHCCs in health-promoting clinical practice through a 12-month implementation intervention. The implementation strategies were based on implementation-research literature and the Astrakan model for leading change. The present study aimed to investigate the experiences from managers, staff and internal facilitators in integrating health-promoting practices into their daily routine work following an implementation intervention. Method: A qualitative study with an exploratory purpose was conducted at five PHCC in Örebro County. Individual interviews with managers (n=9), internal facilitators (n=10) and five focus group discussions with PHCC staff (n=18) representing different professions were conducted using semi-structured interview guides. Data were collected 4 months after the completion of the implementation effort and analysed deductively using Normalization Process Theory. Results: A health promotion approach could be introduced by viewing the task as a shared responsibility and goal for all professional groups but with the managers as leader of the project. The relationship with the manager was important for staff to make the intervention to fit in existing practice. Through inter-professional collaboration a greater understanding of each other’s work emerged and made it possible to take advantage of existing competence. Conclusion: Tailored strategies make it possible to introduce a health promotion approach in primary care. The role of the PHCC manager is a key factor that may build a bridge between the goals and what is possible. This needs to be done together with the entire work team to create collective participation.