Prehabilitation in Adult Cancer Patients Undergoing Chemotherapy or Radiotherapy: A Scoping Review.

: The effectiveness and feasibility of cancer prehabilitation have been well-validated in surgical settings, but its role in non-surgical treatments, such as chemotherapy and radiotherapy (RT), remains unclear. This scoping review aims to systematically explore the existing literature on prehabilitation programs for non-surgical cancer treatments. : Following the scoping review methodology developed by the Joanna Briggs Institute, seven databases were systematically searched from their inception to October 2024 for peer-reviewed studies involving prehabilitation prior to non-surgical treatment. Data were extracted and reported adhering to PRISMA-ScR guidelines, using a convergent synthesis design to present qualitative and quantitative evidence. No formal risk-of-bias or quality appraisal was conducted. : Of 22,122 studies, 39 met the inclusion criteria, yielding a combined sample of 6073 patients and thirty-four unique interventions. Sample sizes ranged from 9 to 1992, with randomized control trials being the most common (16). Head and neck cancer was the most frequently studied, followed by breast, esophageal/gastric, and lung cancer. Of the included interventions, 23 were unimodal and 16 were multimodal. Exercise was the most common component (30), with nutrition (13), psychosocial (10), and educational (8) components also present. Most efficacy studies (84%) reported improved outcomes and nearly all (93%) feasibility studies found prehabilitation acceptable and implementable. : This review highlights a growing body of literature examining prehabilitation prior to chemotherapy or RT in adult cancer patients, with studies suggesting potential benefits and feasibility. However, long-term trials, especially in diverse cancers and older populations, remain scarce. Our results provide insight into future implementation, evaluation of outcomes, and directions for future prehabilitation research.