Background For a healthy lifestyle, people with moderate, severe, and profound intellectual disabilities living in residential facilities and/or participating in day activity centers are dependent on their direct support professionals. However, it is unclear what knowledge and skills these direct support professionals require to support these individuals in living a healthy lifestyle. Therefore, the aim of this study was to identify the needs of direct support professionals for supporting these people with moderate to profound intellectual disabilities to achieve and maintain a healthy lifestyle. Method Direct support professionals (n = 28) were interviewed with the use of a semi-structured protocol based on the theoretical domains framewor...