Expert Consensus on Physical Activity Use for Young Adult Cancer Survivors' Biopsychosocial Health: A Modified Delphi Study.

Significance: Cancer treatment impacts young adults' (YA) biological and psychosocial health, with over >50% reporting unmet needs. Physical activity (PA) offers symptom mitigation, risk reduction, and critical independence to YA (age 18-39 years) affected by cancer. When tailored to YA, PA guidelines can facilitate PA integration into survivorship care. However, no current expert consensus on PA use in YA exists. Aim: To describe expert consensus and opinions on the application of PA as a biopsychosocial health promotion strategy for YA cancer survivors, guided by the Revised Symptom Management Theory. Methods: A four-round modified Delphi study was conducted with international multidisciplinary experts (round I/II, n  = 18; round III, n  = 57; round IV, n  = 45) in exercise oncology, symptom management, survivorship care, and adolescent-YA cancer care. Qualitative content analysis, descriptive statistics (% agreement, SD, mean), and inter-rater reliability (Kappa) were calculated. Results: Experts reached a consensus on the following: PA should be integrated into YA cancer care as part of supportive oncology to mitigate symptoms of fatigue, cardiometabolic health, muscle mass loss, altered body composition, and anxiety/depression; PA improves functional capacity and wellbeing; at all points on the care continuum YA should be asked if they would like guidance on PA use; PA interventions should be tailored for personal facilitators, barriers, and motivations, to maximize survivorship adaptations. Conclusion/Implication: The results of this study identified areas of expert consensus that warrant PA implementation in YA survivorship care to guide future research and clinical endeavors.