Many health professionals have expressed difficulty finding ways to keep people with disabilities engaged in community-based physical activity/rehabilitation programs. A major reason for this low adherence may be that the recommended intervention plan does not match well with the specific needs of the individual. Various personal and/or environmental factors along with the person's level of functioning can impede participation in healthful physical activity/rehabilitation. The International Classification of Functioning, Disability and Health (ICF) can be a useful tool for identifying key factors associated with participation in community-based physical activity/rehabilitation. The ICF allows health professionals to identify the level of functioning at the body, person and societal level, as well as understand the person-environment contextual factors that may impede or enhance participation. This paper describes how the ICF can assist health professionals in identifying a broader constellation of factors when prescribing physical activity/rehabilitation programs for persons with varying levels of disability.