The longitudinal relationship among physical activity, loneliness, and mental health in middle-aged and older adults: Results from the Edad con Salud cohort - Rodeiro, Jordi; Olaya, Beatriz; Haro, Josep Maria; Gabarrell-Pascuet, Aina; Ayuso-Mateos, Jose Luis; Francia, Lea; Rodriguez-Prada, Cristina; Dolz-del-Castellar, Blanca; Domenech-Abella, Joan (Mental Health and Physical Activity, 2025)