This document summarizes a systematic literature review examining randomized controlled trials that assess the effectiveness of physical activity and exercise as interventions for anxiety disorders. It finds preliminary evidence that exercise may help reduce anxiety, but notes the evidence is limited by heterogeneous populations, interventions, and control groups across studies. The review aims to address gaps in the evidence base by focusing specifically on trials involving participants with clinically diagnosed anxiety disorders. It will appraise and summarize the existing evidence quality and draw conclusions to help inform clinical guidelines.