White matter microstructure mediates the association between cardiorespiratory fitness and cognitive performance in older adults. - Tinney EM; Warren AEL; O'Brien A; Odom H; Ai M; Sutton BP; Jain S; Kang C; Huang H; Wan L; Oberlin LE; Grove G; et al. (Alzheimer's & dementia (New York, N. Y.), 2025)