CAJ | 학술논문

为研究速滑陆地模仿练习的专项性,采用视频和表面肌电同步采集了王北星冰上专项和陆地模仿下肢支撑腿肌电参数,从主要做功肌群、肌肉激活强度和肌肉激活顺序三个角度研究冰上专项肌肉用力特征及陆地模仿练习的专项性。结果显示：冰上下肢专项肌肉用力特征是：胫骨前肌和股前群肌是主要做功肌群,胫骨前肌的屈过程激活程度更大,而股前群肌是蹬伸过程的激活程度更大,着冰前胫骨前肌就处于持续发力状态,蹬冰时灭活,着冰前股前群肌出现预激活,离冰时灭活。陆上滑跑模仿练习在主要做功肌群、肌肉激活强度屈伸间变化及肌肉激活顺序上与专项相似,具有较高的专项练习价值。但在肌肉激活强度、胫骨前肌做功时程和腓肠肌动员方面明显不足。建议：将来运动员在陆上进行此项练习时应在动作速度、非稳定支撑、着地前的足背屈和蹬伸末期伸踝等几个方面进行改善。
위연구속활륙지모방연습적전항성,채용시빈화표면기전동보채집료왕북성빙상전항화륙지모방하지지탱퇴기전삼수,종주요주공기군、기육격활강도화기육격활순서삼개각도연구빙상전항기육용력특정급륙지모방연습적전항성。결과현시：빙상하지전항기육용력특정시：경골전기화고전군기시주요주공기군,경골전기적굴과정격활정도경대,이고전군기시등신과정적격활정도경대,착빙전경골전기취처우지속발력상태,등빙시멸활,착빙전고전군기출현예격활,리빙시멸활。륙상활포모방연습재주요주공기군、기육격활강도굴신간변화급기육격활순서상여전항상사,구유교고적전항연습개치。단재기육격활강도、경골전기주공시정화비장기동원방면명현불족。건의：장래운동원재륙상진행차항연습시응재동작속도、비은정지탱、착지전적족배굴화등신말기신과등궤개방면진행개선。
For the purpose of researching the special characteristics of land simulates in speed skating, the article measured the EMG parameter of WANG Beixing supporting leg in skating and land simulate with the methods of synchronizing the video and sEMG, researched the special muscle force characteristics form three dimensions of the main work muscle group, the intensity of muscle activation and muscle activation sequence and the special characteristics of land simulates. Results： anterior tibial and quadriceps femoris are the major working muscle groups, the activation level of tibialis anterior muscle is greater in flexion;while the quadriceps femoris is in extension; tibialis anterior muscle is constantly in power before landing on ice and inactivate when pushing, quadriceps femoris is activate in advance before landing and inactivated when off ice. The main work muscle group, the change of muscle activation intensity in flexion anti extension, and the muscle activation sequence between ice and land is similarity, so it has high specific training value. But the level muscle activation, tibialis anterior muscle work schedules, and gastrocnemius muscle activation are obviously deficiencies. It is suggestedthe action speed, unstable support, dorsiflexion of foot before landing and stretch ankle in off landing be improved to enhance the special of training.