Motivational correlates of physical activity in persons with an intellectual disability: a systematic literature review

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Abstract
The purpose of this study is to systematically retrieve, examine and discuss scientific studies focusing on motivational correlates that both contribute to, and can be assumed to be effects of, participation in sport, recreation, or health-related physical activities in persons with intellectual disability (ID). A systematic analysis of the literature retrieved through electronic databases and other resources was performed, covering articles published from 1980 through 2009. Inclusion criteria were based on terms referring to the participants, the psychosocial correlates and the type of activity. Twenty-three articles satisfied the inclusion criteria, and were divided into four categories of studies: (1) cross-sectional designs, (2) experimental prospective one-group designs, (3) longitudinal comparative intervention designs, and (4) qualitative designs. The level of quality regarding the intervention studies was assessed using four different scales, and on average they depicted a moderate level of evidence. Both exercise and sport-related activities seem to contribute to well-being. Improved physical fitness and elevated skill level gained during exercise and sport activities appear to serve as mediators for increased perceptions of self-efficacy and social competence. Peer modelling, as well as video and audio reinforcement, appear to be important modalities in maintaining compliance to exercise programmes.