Sylvia Lin ^1* Mathew Failla ² Ryan Zarzycki ³

• ¹ Washington University in St. Louis, St. Louis, United States
• ² University of Vermont, Burlington, Vermont, United States
• ³ Arcadia University, Glenside, Illinois, United States

• What is the ideal combination of objective measures to demonstrate physical readiness to return to sport?• How do we mitigate secondary and tertiary risk?• When and how do we address psychological readiness to return to sport?• How do we overcome gaps in healthcare systems after formal rehabilitation has ended but before return to sport has occurred?In this Research Topic, we explore five different facets of this topic through the perspective of five unique manuscripts, including three original research articles.Wang et al discuss leveraging telehealth as an effective, cost-effective way to address acute shoulder pain in a young semi-professional tennis player. During a virtual training session, the athlete's guardian was instructed how to perform basic PT assessments and perform them with the athlete, so that the clinician could diagnose and treat the suspected condition. While high-quality evidence regarding the effectiveness of telehealth compared to in-person care is currently lacking, the case study by Wang et al provides a template for clinicians to use telehealth effectively with young athletes who have poor access to healthcare.Armitage et al focus on summarizing the current state of literature regarding football injury prevalence, etiology, as well as on-field rehabilitation and return to play frameworks. They provide suggestions for future research based on knowledge and implementation gaps.Huynh et al examine the specific physical demands of Division I collegiate basketball players through video-based motion analysis, comparing by sex and playing position. Significant differences in activity requirements were found in both categories, which the authors propose should be considered during rehabilitation and return to sport decision-making.Becker et al examine the effect of fatigue on athletes' knee stability during a single drop landing. Given the conflict in existing literature regarding fatigue and knee kinematics, this study sought to induce cardiovascular fatigue comparable to sporting activity. The authors propose consideration of fatigue in injury prevention, during rehabilitation, and return to sport testing.Finally, Weber et al examined the relationship between common hop tests used in return to sport testing and movement quality. The authors found no relationship between hop test symmetry and the "Quality First" assessment. These findings highlight the importance of using qualitative assessments of movement quality in addition to traditional hop tests.Given the positive engagement, we believe that this special issue on Return to Sport Training and Testing has made an important contribution to the literature in areas of need. We hope these articles stimulate ideas and generate further discussion and research on this multifaceted and complex, evolving issue.