Effects Of Different Pressure And Blood Flow Restriction Training On Basketball Players With Chronic Ankle Instability

Objective: This study compared the effects of blood flow restriction training with different pressure load on athletes’ motor function,ankle muscle strength,joint range of motion,balance function and proprioception.To explore the rehabilitation effect of blood flow restriction training under different pressure load on chronic ankle instability of basketball athletes,so as to provide reference for the application of blood flow restriction training in chronic ankle instability.Methods: 42 basketball students with chronic ankle instability in Guangzhou Sport University were randomly divided into three groups: control group without blood flow restriction（group A）,blood flow restriction 200 mm Hg group（group B）and blood flow restriction 300 mm Hg group（group C）.Three groups received ankle resistance training（resistance setting: 70%1RM in group A,30%1RM in group B and group C）and ankle balance training for 6 weeks（twice a week,60 min each time）.Before and after the experiment,the same therapist evaluated the subjects’ Cumberland scale,ankle range of motion,isokinetic muscle strength of flexion and extension,valgus and valgus muscles,balance function,active position perception,motor function and so on.The data was analyzed by IBM SPSS（version 22.0）.The confidence interval was 95%（P < 0.05）.Results: 1.Cumberland ankle instability tool（CAIT）:（1）Intra-group comparison:the CAIT of the affected side of the three groups and the healthy side of group C were significantly improved as compared with those before training;（2）There was no significant difference among the groups.2.Range of motion of ankle joint: there was no significant difference in the range of motion of ankle joint between groups before and after training（P > 0.05）.3.Isokinetic muscle strength of ankle joint:（1）Intra-group comparison:（1）The maximum peak force distance of dorsal extension,metatarsal flexion and valgus in group A was significantly higher than that before training（P < 0.01）.（2）The maximum peak torque of dorsal extension,metatarsal flexion and valgus in group B was significantly higher than that before training（P < 0.01）.（3）The maximum peak torque of dorsal extension,metatarsal flexion,valgus and valgus of the affected side in group C and the maximum peak torque of dorsal extension on the healthy side in group C were significantly higher than those before training（P < 0.05）.（2）There was no difference among groups（P > 0.05）.4.Balance function:（1）Intra-group comparison: the Y-balance comprehensive score of the affected side in the three groups was significantly higher than that before training,and the Y-balance comprehensive score of the healthy side in group A and B was significantly higher than that before training.（2）There was no significant difference among the three groups.5.Active position sensation of ankle joint: there was no significant difference between groups before and after training and between groups（P > 0.05）.6.Motor function:（1）Comparison within groups:（1）The time used for the Carioca test and the synergistic contraction test in group A was shorter than that before training,and the difference was significant（P<0.05）;（2）The time used for Carioca test and synergistic contraction test in group B and group C was shorter than that before training,and the difference was significant（P<0.01）.（2）There was no difference among groups（P > 0.05）.Conclusion: 1.Both routine strength training and blood flow restriction training can effectively improve the muscle strength and balance function of the muscles around the ankle joint,and the blood flow restriction training of 200 mm Hg and30 mm Hg has similar effect on muscle strength2.Both routine strength training and blood flow restriction training could increase the CAIT score,and the contralateral side of 300 mm Hg blood flow restriction training increased significantly.3.Both routine strength training and blood flow restriction training can improve the motor function of patients in varying degrees.4.Strength training and balance training have no obvious effect on the improvement of position sensation,and proprioceptive training should be strengthened in the training program for patients with chronic ankle instability.