Intervention procedures
MHI
In the CON group, patients were given a paper version of the rehabilitation plan before they were discharged from the hospital. A brief explanation was given to explain the plan and answer any related questions from the patients. The length of the explanation depended on the patient's level of understanding and was usually 5–10 min. After discharge from the hospital, the patients conducted rehabilitation training according to the plan, without any visits to other institutions or inpatient treatment. The control group could only use the data measurement function in the “Rehabilitation Cloud Platform” and could not use the rehabilitation instruction function, thus avoiding contamination in the control group.In the MHI group, the mHealth intervention included these contents: sports medicine doctors will teach the patient how to properly use the “Rehabilitation Cloud Platform” the day before their surgery. The teaching included measuring data such as angle and circumference and how to view the rehabilitation guidance content. The platform then informs the patient before surgery about the knowledge related to the surgery and the importance of rehabilitation. In the home-based rehabilitation stage, the platform will remind the patient to complete their rehabilitation plan and explain the details of the plan for their reference. Patients can upload relevant data according to their needs and the platform's suggestions. The platform can provide feedback instructions to patients according to their uploaded data and suggest whether they should seek medical treatment in time.In addition, the contact information of the doctor is also provided on the platform. If patients have questions about the teaching content in the platform, they can ask the doctor through the platform. The doctor would review and respond timely. The settings and content of the “Rehabilitation Cloud Platform” are shown in Function settings of the “Rhabilitation Cloud Platform.” The figure shows the four functions of the “Rhabilitation Cloud Platform” and their detailed introduction.Rehabilitation exercise education after ACL reconstruction.Data collection interface of the “Rhabilitation Cloud Platform.” 