上海体育学院学报
上海體育學院學報
상해체육학원학보
Journal of Shanghai Physical Education Institute
2012年
2期
30~33
,共null页
男大学生 蹲跳 提踵 表面肌电图 小腿三头肌 信号 比较
男大學生 蹲跳 提踵 錶麵肌電圖 小腿三頭肌 信號 比較
남대학생 준도 제종 표면기전도 소퇴삼두기 신호 비교
male university student; squat jump; toe raise; surfaceelectromyographic; triceps surae muscle; signal; comparison
目的:通过对男大学生小腿三头肌在递增负重提踵和蹲跳动作时表面肌电(sEMG)信号的分析,探讨动作形式与神经肌肉活动方式之间的联系。方法:男大学生在不负重和30%、60%、80%、100%最大力量(1RM)负重下分别进行一次提踵和蹲跳动作,同时记录腓肠肌内侧头(GM)、外侧头(GL)和比目鱼肌(SO)向心收缩阶段的sEMG信号,比较各等级负重条件下两种动作运动时iEMG、MF和MPF等肌电指标的变化。结果:在进行负重提踵时,随着重量增加,GM、GL和SO表面肌电的iEMG均显著增加,但MF和MPF在不同负重等级完成动作时的差异不显著;在进行负重蹲跳时,各肌肉表面肌电信号的iEMG、MF和MPF在各级负重之间具有显著差异,其数值与重量的增加具有线性关系;在不负重提踵时各肌肉的iEMG值与蹲跳差异不显著,但大负重后显著高于蹲跳;MF和MPF值在不负重提踵时显著高于蹲跳,负重后其差异基本不显著。结论:在递增负重提踵和蹲跳动作时,小腿三头肌向心收缩阶段的sEMG信号表现存在差异,其所反映的神经肌肉控制方式不同,提示所完成动作的动力学特性如速度、多关节链等,可能会影响运动单位募集的方式。
目的:通過對男大學生小腿三頭肌在遞增負重提踵和蹲跳動作時錶麵肌電(sEMG)信號的分析,探討動作形式與神經肌肉活動方式之間的聯繫。方法:男大學生在不負重和30%、60%、80%、100%最大力量(1RM)負重下分彆進行一次提踵和蹲跳動作,同時記錄腓腸肌內側頭(GM)、外側頭(GL)和比目魚肌(SO)嚮心收縮階段的sEMG信號,比較各等級負重條件下兩種動作運動時iEMG、MF和MPF等肌電指標的變化。結果:在進行負重提踵時,隨著重量增加,GM、GL和SO錶麵肌電的iEMG均顯著增加,但MF和MPF在不同負重等級完成動作時的差異不顯著;在進行負重蹲跳時,各肌肉錶麵肌電信號的iEMG、MF和MPF在各級負重之間具有顯著差異,其數值與重量的增加具有線性關繫;在不負重提踵時各肌肉的iEMG值與蹲跳差異不顯著,但大負重後顯著高于蹲跳;MF和MPF值在不負重提踵時顯著高于蹲跳,負重後其差異基本不顯著。結論:在遞增負重提踵和蹲跳動作時,小腿三頭肌嚮心收縮階段的sEMG信號錶現存在差異,其所反映的神經肌肉控製方式不同,提示所完成動作的動力學特性如速度、多關節鏈等,可能會影響運動單位募集的方式。
목적:통과대남대학생소퇴삼두기재체증부중제종화준도동작시표면기전(sEMG)신호적분석,탐토동작형식여신경기육활동방식지간적련계。방법:남대학생재불부중화30%、60%、80%、100%최대역량(1RM)부중하분별진행일차제종화준도동작,동시기록비장기내측두(GM)、외측두(GL)화비목어기(SO)향심수축계단적sEMG신호,비교각등급부중조건하량충동작운동시iEMG、MF화MPF등기전지표적변화。결과:재진행부중제종시,수착중량증가,GM、GL화SO표면기전적iEMG균현저증가,단MF화MPF재불동부중등급완성동작시적차이불현저;재진행부중준도시,각기육표면기전신호적iEMG、MF화MPF재각급부중지간구유현저차이,기수치여중량적증가구유선성관계;재불부중제종시각기육적iEMG치여준도차이불현저,단대부중후현저고우준도;MF화MPF치재불부중제종시현저고우준도,부중후기차이기본불현저。결론:재체증부중제종화준도동작시,소퇴삼두기향심수축계단적sEMG신호표현존재차이,기소반영적신경기육공제방식불동,제시소완성동작적동역학특성여속도、다관절련등,가능회영향운동단위모집적방식。
Objective : it is to analyze the surfaceelectromyographic (sEMG) signals of the triceps surae muscle at incremental weight squat jump and toe raise, to discuss the relationship between the kinetic properties of motion and the behaviour of electromyographic. Methods: sEMG signals of the soleus (SO), gastrocnemius medialis (GM) and gastrocnemius lateralis (GL) muscles were recorded in 12 healthy male subjects, during the action of squat jump and toe raise at the weight 0, 30%, 60%, 80%, 100%, separately. The iEMG, MF and MPF were analyzed at each action and loads. Results: the iEMG of GM, GL and SO increased significantly along with the load; MFand MPF had no significant difference between each loads grade at weight toe raise. The iEMG, MF and MPF increased significantly while the load increased, and there was a positive linearity in these indexes of sEMG and the load at weight squat jump. The value of iEMG had no significant difference between squat jump and toe raise without load, however, the iEMG at toe raise was higher than squat jump with heavy load. At toe raise without load, the value of MF and MPF were higher than squat jump significantly, but had no significant difference with load. Conclusion: the pattern of sENG signal of the triceps sttrae muscle showed diversity at incremental weight squat jump and toe raise, which reflected the different patterns of neuromuscular control, indicating that the recruitment pattern of motor units might be affected by the kinetic properties such as velocity and multi-joint chains.