Abstract: Objective: To observe the intervention effects of Taijiquan, Baduanjin and Wuqinxi in patients with knee osteoarthritis. Methods: Collected 165 KOA patients and randomly divided them into Taijiquan group, Baduanjin group, and Wuqinxi group, each with 55 people. Each group was required to practice the exercises 3 times a week, 30~40 minutes each time. Before and after 12 weeks of exercise, collected the VAS scores, Lequesne indexes, recurrence deviation of joint mobility, quadriceps and hamstrings' integrated electromyography (iEMG), and stability limit (LOS) of the 3 groups of patients. As well as stand-to-go test, strengthen Romberg test data. Results: Comparing the three groups after the intervention, in terms of VAS, there was no statistical significance among the three groups (P>0.05). In terms of Lequesne index, the Taijiquan group was lower than the Baduanjin group and the Wuqinxi group, the difference was statistically significant (P<0.05); while the Baduanjin group and the Wuqinxi group had no statistically significant difference (P>0.05). In terms of proprioception, in the range of 0°-40°, the Taijiquan group was lower than the Baduanjin group and the Wuqinxi group, the difference was statistically significant (P<0.05); when the Baduanjin group was compared with the Wuqinxi group, the difference was not statistically significant (P>0.05). In the 40°-80° and 80°-120° areas, the Taijiquan group was lower than the Baduanjin group and the Wuqinxi group, the difference was statistically significant (P<0.05), while the Wuqinxi group was lower than the Baduanjin group Group, the difference was statistically significant (P<0.05). In terms of muscle strength, there was no statistical significance among the quadriceps femoris iEMG3 groups (P>0.05). But in the hamstring muscle iEMG Taijiquan group and Wuqinxi group were higher than the Baduanjin group, the difference was statistically significant (P<0.05); while the difference between the Taijiquan group and the Wuqinxi group was not statistically significant (P>0.05). In terms of both balance test and LOS area, the Taijiquan group was higher than the Wuqinxi group and the Baduanjin group after the intervention, the difference was statistically significant (P<0.05); while the difference between the Baduanjin group and the Wuqinxi group was not significant (P>0.05). In the standing-walking test and the reinforced Romberg test, the Taijiquan group was better than the Wuqinxi group and the Baduanjin group, and the difference was statistically significant (P<0.05). Conclusion: In the horizontal comparison of Taijiquan, Baduanjin, and Wuqinxi interventions in KOA patients, 24-style Taijiquan can not only improve knee flexor and extensor muscle strength, relieve pain, but also enhance joint proprioception and balance more effectively. Taijiquan is better in improving joint functions than Baduanjin and Wuqinxi, and is worthy of further promotion and application.

Key words: health-preserving exercises, Taijiquan, Baduanjin, Wuqinxi, knee osteoarthritis