| Objective:Knee osteoarthritis(KOA)is the most common chronic osteoarthrosis which affects approximately 6% of adults,and people over the age of 55 are at increased risk of developing KOA,especially in older women.In some parts of China,the prevalence of KOA is as high as 42.8% for women and 21.5% for men who over 60 years old.KOA leads to lower limb pain,swelling,limited joint activity,and impaired balance control,resulting in decreased body function,such as difficulty walking,stair walking obstacles,etc.,seriously endangering the physical and mental health of the elderly.There are exist certain limitations in the current treatments of KOA.As a new rehabilitation technology,PNF covers special techniques and spiral diagonal motion integration modes,which can cause multi-plane motion of lower limb joints.Therefore,this study intends to evaluate the effectiveness of 12-week PNF in the treatment of KOA from three perspectives: pain relief,improvement in range of joint,and changes in frontal joint.Method:Participants with KOA were recruited from Hancang,Baoshan Garden and other communities in Jinan City.Thirty-five elderly people aged 60 years who met the American College of Rheumatology KOA diagnostic criteria,were randomly assigned to the PNF group and the control group.The PNF group was performed PNF exercises with the assistance of a professional therapist.The control group was conducted a health lecture education.Each intervention for 1 hour each time,3 times a week for 12 weeks.After 12 weeks of intervention,the PNF group was 13 and the control group was 16.All subjects required three trials,each trial included pain assessment,range of motion assessment,and gait testing.The infrared motion capture system with 8 cameras and a force plate were simultaneously used to collect the stair gait of the subjects before,during and after the intervention.Before each gait test,the pain assessment and range of motion assessment were evaluated by a professional therapist.Statistical analysis was performed on the evaluation indicators using two-way repeated measures analysis of variance.Results:1.Pain score results:(1)Intra-group comparison showed :Compared with pre-intervention,the pain score of the PNF group was significantly decreased(p<0.05)after 6 weeks of intervention;the score was significantly decreased after 12 weeks of intervention than that of before intervention and after 6 weeks of intervention respectively(p<0.01,p<0.05).(2)The comparison between the groups showed a significant difference in pain scores at week 6 between the two groups(p<0.05);2.Range of motion of lower limbs Joint test results(1)Intra-group comparison showed:1)Compared with pre-intervention,the PNF group significantly increased the hip flexion activity(p<0.05),hip extension activity(p<0.05),hip internal rotation activity(p<0.05),hip external rotation activity(p<0.05)and knee flexion activity(p<0.05)after 6 weeks of intervention;2)Compared with before intervention,the PNF group significantly increased hip flexion activity(p<0.05),hip extension activity(p<0.05),hip internal rotation activity(p<0.01),hip external rotation activity(p<0.05)and knee flexion activity(p<0.05)after 12 weeks of intervention;3)Compared with the 6 weeks of intervention,the PNF group significantly increased the hip extension activity(p<0.05),internal rotation activity(p<0.01),external rotation activity(p<0.05),and knee flexion activity(p<0.05)after 12 weeks of intervention.(2)Comparison between groups showed: 1)After 6 weeks of intervention,compared with the control group,the PNF group exhibited significant differences in the hip flexion activity(p<0.05),external rotation activity(p<0.05)and knee flexion activity(p<0.05);2)After 12 weeks of intervention,the PNF group exhibited significant differences in the hip flexion activity(p<0.05),hip extension activity(p<0.05),hip internal rotation activity(p<0.05),hip external rotation activity(p<0.05)and knee flexion activity(p<0.05).3.Lower limb frontal moment test results(1)Intra-group comparisons showed: Compared with pre-intervention,the first peak hip abduction moment in the PNF group significantly increased at the 6th and 12 th weeks of intervention(p<0.05,p<0.05),respectively.(2)There was no change in the control group before and after the intervention,and there was no significant difference between the two groups.Conclusions:1.The 12-week PNF intervention significantly decreased the pain score,increased range of motion of the lower limb and improved the moment of the hip frontal plane,suggesting that 12-week PNF intervention may improve the overall stair walking function of KOA patients.2.The 12-week PNF intervention significantly increased the first peak hip abduction moment of KOA patients,suggesting that the frontal movement pattern of the lower limb joint can be added to the treatment of KOA in the future,which may be useful for delaying the development of KOA. |
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