To explore the application effect of anti-gravity treadmill system in walking training of patients after anterior cruciate ligament reconstruction (ACLR).

From October 2020 to May 2022, 40 patients with ACLR who underwent rehabilitation treatment in Naval Qingdao Special Service Rehabilitation Center were selected and divided into observation group and control group by random number table method, with 20 cases in each group. Inclusion criteria: the patients who have unilateral anterior cruciate ligament (ACL)injury combining meniscus injury, accept ACLR four to five weeks after injury, and start rehabilitation at one week after surgery. Exclusion criteria: old ACL injury, knee surgery history, combining posterior cruciate ligament and collateral ligaments injuries and lower limb fractures etc., cognitive dysfunctions and cardiovascular diseases The rehabilitation training time of the two groups was eight weeks. Patients in the control group were given routine walking training, while patients in the observation group were given walking training with anti-gravity treadmill system. The isoforce isokinetic muscle strength rehabilitation evaluation system was used for active joint angle reproducibility deviation test, the German Steinbichler three-dimensional gait analysis system was used for gait analysis, and the Lysholm score was used to evaluate the two groups of patients. The count data were described by frequency, the difference was analyzed by chi square analysis, and the measurement data of normal distribution were described by(±s), and analysed by repeated measures ANOVA.

The Lysholm score of the observation group was better than that of the control group at eight and 12 weeks after operation, and the differences were statistically significant (t=14.630, 8.568, both P<0.05). The active joint angle recurrence deviation was better than that of the control group, and the differences were statistically significant (30°: t=5.273, 5.410; 60°: t=4.420, 3.934, all P<0.05). Gait analysis score of the experimental group were better than those of the control group, and the differences were statistically significant (step length : t=5.704, 7.780; stride frequency: t=8.270, 5.725; gait speed: t=6.068, 2.758; all P<0.05).

Weight-loss walking training with anti-gravity treadmill system can improve the knee joint function and proprioception of patients after ACLR. It is an effective method to improve the walking ability of patients after ACLR.