Evidence-based practice (EBP) is a growing movement in the health and educational disciplines that recommends emphasis on research outcomes during decision making in practice. EBP is made possible through evidence based research (EBR), which attempts to synthesize the volume and scientific rigor of intervention effectiveness. With the purpose of assessing the impact of this movement on adapted physical activity, this article (a) describes EBP/EBR and outlines its methodological development, (b) provides an historical perspective of EBP/EBR in APA, (c) examines EBR quality indicators in the review literature published in "Adapted Physical Activity Quarterly", (d) identifies and synthesizes thematic domains appearing in these review articles, and (e) discusses practical examples of professional issues in APA arising from a lack of EBR. (Contains 3 tables and 3 figures.)