Introduction
HBM, MHI
DISEASES
With the increase in people's health awareness, more residents are engaged in physical exercise, which has led to annual increases in the incidence of anterior cruciate ligament (ACL) injuries (Mobile health (mHealth) facilities (smartphone-based educational apps, web-based tools, SMS text messaging, PDA physiological status monitoring, and connected captors) have been widely proven to be effective interventions in different health areas, which can realize the transition from “one-to-one” to “one-to-many” for doctors and patients (Regarding intervention content, the Health belief model (HBM) is one of the most widely used theories to examine the barriers and foundation of individual participation in programs that focus on preventing diseases and promoting healthy lifestyles (Therefore, the researchers have developed a mHealth-based intervention applet [MHI; “Rehabilitation Cloud Platform” (Beijing QianriQianyue Technology Ltd.)] for patients. The intervention content of the applet is designed based on HBM. This randomized controlled study aimed to compare the changes in knee joint clinical and subjective functional indicators in the MHI and the CON groups at 2 and 6 weeks after ACL reconstruction. This study hypothesized that a mobile health intervention would be more beneficial to the early recovery of patients after ACL reconstruction.