BACKGROUND: The aim of the study was to identify promoting and impeding factors for successful implementation of a Dutch primary health care-based lifestyle programme called 'BeweegKuur'. BeweegKuur aims to increase the physical activity and change the diet of people at increased health risk due to overweight or obesity. OBJECTIVE: To determine perceived promoting and impeding factors in the implementation of the BeweegKuur programme for overweight and obese people. METHODS: This study consisted of 3 focus group meetings with intervention participants, 15 interviews with health care professionals (HCPs) and 1 focus group session with dieticians. The interviews and focus groups were recorded and transcribed verbatim. The data were analysed with the Nvivo qualitative research software package. RESULTS: For some intervention participants, the invitation to participate in BeweegKuur came unexpectedly, as they had not been diagnosed with an illness. HCPs were aware of this and took time to explain to participants that the programme was appropriate and safe for them. Participants as well as professionals were generally positive about the feasibility of the programme for overweight and obese people. CONCLUSIONS: HCPs as well as intervention participants were motivated to participate in the programme, and generally indicated that the intervention was in accordance with their needs. The multidisciplinary approach and the combination of physical activity and dietary behaviour change can make the BeweegKuur programme a success if potential impeding factors like those identified in the present study are overcome.