CAJ | 학술논문

目的：通过分析短距离速滑运动员弯道单步周期腿部肌电特征,探讨弯道单步周期腿部肌肉动作和协调模式,发现腿部力量训练可能存在的问题。方法：采集运动员第1弯道2～6次连续5次单步周期肌电图,原始肌电图进行全波整流处理,再进行均化处理。结论：1）单步周期收腿阶段大小腿折叠可能是由蹬伸动作的后效应引起的随势动作,踝关节在右单步周期收腿阶段背屈,落腿阶段拓屈,左单步周期收腿阶段和落腿阶段前期背屈,落腿阶段后期拓屈;2）左单步周期重心转移阶段腓肠肌表现出与胫骨前肌共激活,蹬冰阶段胫骨前肌表现出与腓肠肌共激活,但激活程度逐渐降低,直至消失。蹬冰期股四头肌和股后肌群表现共激活协调模式,左单步周期协调性更高;3）在实践训练过程中对胫骨前肌、股直肌和臀大肌存在认识不足的问题。
목적：통과분석단거리속활운동원만도단보주기퇴부기전특정,탐토만도단보주기퇴부기육동작화협조모식,발현퇴부역량훈련가능존재적문제。방법：채집운동원제1만도2～6차련속5차단보주기기전도,원시기전도진행전파정류처리,재진행균화처리。결론：1）단보주기수퇴계단대소퇴절첩가능시유등신동작적후효응인기적수세동작,과관절재우단보주기수퇴계단배굴,락퇴계단탁굴,좌단보주기수퇴계단화락퇴계단전기배굴,락퇴계단후기탁굴;2）좌단보주기중심전이계단비장기표현출여경골전기공격활,등빙계단경골전기표현출여비장기공격활,단격활정도축점강저,직지소실。등빙기고사두기화고후기군표현공격활협조모식,좌단보주기협조성경고;3）재실천훈련과정중대경골전기、고직기화둔대기존재인식불족적문제。
Objective： This paper analyzed the leg muscles＇ EMG features of speed skaters in single-step cycles of the curving skating,discussed the leg muscles＇ movement pattern and coordination model,and found out the possible problems of leg strength training. Methods： The original EMG from second to sixth single-step cycles in the first bend was collected,and it was analyzed by full wave rectification process and the mean data was collected.Conclusions： 1） In right single-step cycle of the holding back leg stage,the folding of thigh and calf may be caused by the effect of action of kicking back,ankle extended at the holding back leg stage and it flexed at the dropping leg stage. In left single-step cycle,ankle extended at the holding back leg stage and the early dropping leg stage,and it flexed at the late dropping leg stage. 2） The left anterior tibial muscle and gastrocnemius are stimulated simultaneously when body gravity was transferred in left single-step circle and in kick phase,but the extent of stimulation in kick phase reduced gradually until it disappeared. The femoral head four muscles and posterior femoral muscles worked in a co-activation coordination model,which in left single-step circle is better than in right one. 3） There is still lack of understanding of anterior tibial muscle,rectus femoris and gluteus maximus.