Effect of the Home-based Digital-assisted Dyadic Tai Chi (HDTC) Training Program on Cardiac Function Among Sedentary Individuals With HF and Care Burden of Their Caregivers: a Randomized Controlled Trial

Participants will receive usual care plus HDTC training program, including four parts: (1)30-minute educational seminar via Tencent: provide disease knowledge, propose strategies to replace sedentary behavior, and introduce Tai Chi. (2)1-hour online nurse-lead dyadic coaching session: introduce dyadic Tai Chi, clarify the roles and responsibilities, and establish a shared goal among dyads. (3)1-hour preliminary Tai Chi training session: face-to-face, introduce online Tai Chi learning, demonstrations on using heart rate monitor, and suggestions for safe home environment. (4)12-week Tai Chi training: Dyads learn Tai Chi following Tai Chi master online. Each session will last 30 minutes in week 2, increase to 40 minutes in week 3, and reach 50 minutes in week 4. The dyads' mastery of Tai Chi will then be assessed either onsite or online. Subsequently, they will practice Tai Chi with the master once a week and follow instructional videos twice a week, with each session lasting 50 minutes.

HF-caregiver dyads in the control group will receive the usual care, including a 30-min online comprehensive education and nurse-led support through telephone consultations in the aspects of symptom management, medication, dietary and exercise suggestions, psychosocial support, and regular monthly follow-up every month.