Exercise is recommended as a therapy to address several health related side effects of cancer treatment, but it is not routinely offered during care. This 'know-do' gap between what research has shown to be effective and what is actually being delivered in real-world oncology practice is preventing people from receiving best practice care. Implementation science is the scientific study of strategies to promote the use of evidence-based practices in routine clinical care. I will explore common barriers to exercise delivery and provide implementation science-informed solutions for success.