北京体育大学学报
北京體育大學學報
북경체육대학학보
Journal of Beijing University of Physical Education
2013年
4期
72~76
,共null页
段子才 张戈 汪东明 朱云
段子纔 張戈 汪東明 硃雲
단자재 장과 왕동명 주운
卧推 卧推抛起 抗阻训练 表面肌电
臥推 臥推拋起 抗阻訓練 錶麵肌電
와추 와추포기 항조훈련 표면기전
bench press ; bench throw; resistance training ; sEMG
比较卧推抛起(bench throw,BT)与卧推(bench press,BP)在动作的力、速度和功率等方面的差别,并分析BT练习的适宜负重;结合进行练习时有关肌肉的表面肌电活动情况,探讨动作速度对抗阻工作时神经肌肉活动方式的影响。方法:12名男大学生以个人30%、50%、70%、90%1RM的杠铃重量分别进行相等负重的BP和BT动作,测量两种动作时杠铃运动的力、平均速度和峰功率;同时记录胸大肌、肱三头肌和肱二头肌的表面肌电信号,选取平均积分振幅(AEMG)、中位数频率(MF)和平均功率频率(MPF),进行两动作和各负重等级之间的多重分析比较。结果:在相同重量的条件下,BT动作在各级负重上均产生了较BP更高的峰功率,在30%和50%1RM负重时较BP具有显著更高的动作速度;在相等负重的BP和BT时,胸大肌和肱三头肌的AEMG在动作之间差异不显著,但均与负重重量同步增加;在BT时,胸大肌的MF在所有负重等级上较BP时显著更大,在30%、50%1RM负重时MPF较BP时显著更大。结论:BT动作更加有利于上肢爆发力的训练,以50%1RM的负重进行BT练习较为适宜;肌肉工作时要实现更快的速度和产生更大功率,需要对主动肌激发更高频率的神经冲动。
比較臥推拋起(bench throw,BT)與臥推(bench press,BP)在動作的力、速度和功率等方麵的差彆,併分析BT練習的適宜負重;結閤進行練習時有關肌肉的錶麵肌電活動情況,探討動作速度對抗阻工作時神經肌肉活動方式的影響。方法:12名男大學生以箇人30%、50%、70%、90%1RM的槓鈴重量分彆進行相等負重的BP和BT動作,測量兩種動作時槓鈴運動的力、平均速度和峰功率;同時記錄胸大肌、肱三頭肌和肱二頭肌的錶麵肌電信號,選取平均積分振幅(AEMG)、中位數頻率(MF)和平均功率頻率(MPF),進行兩動作和各負重等級之間的多重分析比較。結果:在相同重量的條件下,BT動作在各級負重上均產生瞭較BP更高的峰功率,在30%和50%1RM負重時較BP具有顯著更高的動作速度;在相等負重的BP和BT時,胸大肌和肱三頭肌的AEMG在動作之間差異不顯著,但均與負重重量同步增加;在BT時,胸大肌的MF在所有負重等級上較BP時顯著更大,在30%、50%1RM負重時MPF較BP時顯著更大。結論:BT動作更加有利于上肢爆髮力的訓練,以50%1RM的負重進行BT練習較為適宜;肌肉工作時要實現更快的速度和產生更大功率,需要對主動肌激髮更高頻率的神經遲動。
비교와추포기(bench throw,BT)여와추(bench press,BP)재동작적력、속도화공솔등방면적차별,병분석BT연습적괄의부중;결합진행연습시유관기육적표면기전활동정황,탐토동작속도대항조공작시신경기육활동방식적영향。방법:12명남대학생이개인30%、50%、70%、90%1RM적강령중량분별진행상등부중적BP화BT동작,측량량충동작시강령운동적력、평균속도화봉공솔;동시기록흉대기、굉삼두기화굉이두기적표면기전신호,선취평균적분진폭(AEMG)、중위수빈솔(MF)화평균공솔빈솔(MPF),진행량동작화각부중등급지간적다중분석비교。결과:재상동중량적조건하,BT동작재각급부중상균산생료교BP경고적봉공솔,재30%화50%1RM부중시교BP구유현저경고적동작속도;재상등부중적BP화BT시,흉대기화굉삼두기적AEMG재동작지간차이불현저,단균여부중중량동보증가;재BT시,흉대기적MF재소유부중등급상교BP시현저경대,재30%、50%1RM부중시MPF교BP시현저경대。결론:BT동작경가유리우상지폭발력적훈련,이50%1RM적부중진행BT연습교위괄의;기육공작시요실현경쾌적속도화산생경대공솔,수요대주동기격발경고빈솔적신경충동。
Objective: The purpose of this experiment was to compare the difference of force, velocity, power and the surface eleetromyographic (sEMG) between bench press( BP) and bench throw(BT). Methods: 12 male un- dergraduates practiced barbell BP and BT at 30% ,50% ,70% ,90% 1 RM, respectively. The force, average ve- locity and peak power of action were measured, the sEMG signal of musculi pectoralis major, musculus triceps brachii, and musculus biceps brachii during action were recorded, to mensurate the average amplitude (AEMG) , median frequenee ( MF), mean power frequence (MPF) of electromyographic. For all measures, difference be- tween BP and BT at each barbell load was compared. Results: The results indicated that at the same barbell weight, BT generated significant higher peak power than BP at all weight grade, and higher average velocity at 30% and 50% 1 RM. The AEMG of musculi pectoralis major and musculus triceps brachii had no significant differ- ence between BP and BT at all weight grade, yet the AEMG showed a positive relationship with weight loads. Dur- ing BT, the MF of musculi pectoralis major were higher than BP at all weight grade, and the MPF were higher than BP at 30% and 50% 1 RM. Conclusion : It could concluded that BT exercise was more effective for the explo- sive strength training of upper limbs, 50% 1 RM was a economical weight load to practice BT; To achieve more higher velocity and power, the agonist muscle should be excited by nerve impulse with more high-frequency.