| Objective: the incidence of foot and ankle injury in long-distance runners is high,but it has not received enough attention.If foot and ankle pain after injury continues to run without professional treatment,it will easily develop into chronic foot and ankle pain or cause new injuries.In this study,by comparing the characteristics of periankle function and plantar pressure of healthy runners without injury and foot and ankle pain before and after 20 km running,the reasons for the differences were found,and the changes of ankle pain runners before and after 20 km running were analyzed,so as to provide guidance and ideas for the rehabilitation treatment of foot and ankle pain runners.Methods: Thirteen healthy runners and thirteen runners with ankle pain were tested for foot shape,ankle range of motion,muscle strength,balance ability and plantar pressure before and after 20 km running,and the differences of various indexes between the two groups of runners before and after 20 km running were compared.Results: 1.The two groups after running the subjective force degree scale RPE score there was no significant difference(P>0.05).2.There was no significant difference in VAS scores in the pain group(P>0.05).3.The FPI-6 in the pain group was higher than that before running(P<0.05),and there was no significant difference in AHI between the two groups before and after running(P>0.05).4.There was no significant difference in active and passive activity and WBL between before and after running in the pain group(P>0.05).5.The balance time of standing on one leg with closed eyes before and after running in the pain group was significantly shorter than that in the normal group(P<0.01).6.The maximum muscle strength of varus after running in the pain group was less than that in the normal group(P<0.05).There was no significant difference in maximum muscle strength between the other two groups(P>0.05).7.The pressure peaks of M3 and MF in the pain group after running were higher than those before running(P<0.05),and the pressure peaks of M1,M3,MF and HL were higher than those in the normal group(P<0.05).The post-run MF load rate of the pain group was higher than that of the normal group(P<0.05);the post-run HM and HL load rates of the pain group were higher than that of the normal group(P<0.05);the post-run T1,M1,MF,HM and HL load rates of the pain group were all higher than that of the normal group(P<0.05).The peak pressure of T1 in the pain group after running was lower than that before running(P<0.05).The peak pressure of M3 and HM in the pain group after running was higher than that before running.The peak pressure of M1 in the pain group after running was higher than that in the normal group after running(P<0.05),and the peak pressure of MF in the pain group after running was higher than that in the normal group after running(P<0.01).The MF impulse of the pain group after running was higher than that before running(P<0.05),and the M1,M3,MF and HM impulse were higher than that of the normal group(P<0.05).The FFPOF contact time of the pain group after running was longer than that of the normal group(P<0.05),the foot eversion was more than that of the normal group(P<0.05),and the maximum value and range of motion of the subtalar joint before and after running were greater than that of the normal group(P<0.05).Conclusion: compared with healthy runners,runners with ankle pain showed more obvious pronation and valgus postures after 20 km.Abnormal ankle postures resulted in decreased landing cushioning ability,which may increase the risk of injury.In addition,runners with ankle pain had less balance and tibialis posterioralis fatigue,which may have contributed to the pronation and valgus positions.Foot and ankle pain runners should strengthen the injured side balance and pronation muscle strength training,attention to correct pronation and valgus.Foot and ankle pain after running for 20 km,the stress on the sole of the foot was concentrated on the medial side of the heel,the middle part of the foot and the metatarsal region.Long-term excessive local load may lead to the abnormal structure and function of the foot and ankle,leading to chronic pain or new injury. |
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