Abstract: Objective: To develop a lower limb exercise device and explore its effects of on straight leg elevation training in Adolescent Idiopathic Scoliosis patients after surgery to provide a basis for clinical work. Methods: A total of 119 patients who underwent posterior correction internal fixation and bone graft fusion from January 2021 to December 2022 were enrolled and divided into the experimental group (n=62) and the control group (n=57) according to the random number table. In the control group, the traditional education method was used by nurses instructing and supervising the patients to carry out straight leg elevation training. In the experimental group, nurses used the lower limb exercise device to guide and supervise patients in the straight leg elevation training, and the results of straight leg elevation training of the two groups was recorded separately. Results: Participants in the experimental group showed significantly better compliance and accuracy in straight leg elevation training and satisfaction than in the control group (P<0.05). Besides, patients in the experimental group also passed gas earlier and had higher satisfaction than those in the control group. Conclusion: The lower limb functional exercise device can significantly improve the compliance and accuracy of straight leg elevation training and patients' satisfaction, and promote the functional recovery of gastrointestinal tract after surgery.

Key words: functional exercise; straight leg elevation training; compliance; accuracy; scoliosis; adolescent