A parallel-group randomized controlled trial was conducted. Eligible patients with cardiometabolic multimorbidity were randomized 1:1 to either experimental group (EG, received a tele-exercise training program) or control group (CG, usual care only). The intervention encompassed tele-exercise training program (30 min/session, 3 sessions/week) and weekly remote monitoring for maintenance of exercise. Physical activity and cardiorespiratory fitness were assessed at baseline and 12 weeks. Generalized estimating equations were used to examine the intervention effects via the interaction of time and group.