Beyond FITT: addressing density in understanding the dose-response relationships of physical activity with health-an example based on brain health. - Herold F; Zou L; Theobald P; Manser P; Falck RS; Yu Q; Liu-Ambrose T; Kramer AF; Erickson KI; Cheval B; Chen Y; Heath M; et al. (European journal of applied physiology, 2025)