CAJ | 학술논문

背景:等速测试系统作为一种评价人体肌肉功能水平的研究方法和手段,在研究中得到了越来越广泛的应用.但运用等速肌力测试研究运动训练对青少年肌群发展影响的报道很少.目的:通过等速肌力测试,对长期进行跳高、跳远系统训练的青少年和同年龄的无训练者两类人群膝关节肌肉力量及其特征进行对比分析.设计、时间及地点:对比观察实验,于2008-10/12在河北省体育科学研究所实验室进行.对象:随机抽取河北师范大学附属中学不参加训练的志愿者20名作为普通组,抽取石家庄市体校进行跳高、跳远训练的志愿者20名作为训练组,参试者均为男性.方法:采用Cybex-6000等速测试系统,按照测试要求对参试者膝关节进行测试,测试顺序为先向心后离心.测试速度为慢速60(°)/s、中速120(°)/s、快速240(°)/s.主要观察指标:膝关节屈、伸肌群的相对峰力矩.结果:纳入实验对象40名,均进入结果分析.与普通组比较,训练组两侧膝关节60,120,240(°)/s屈、伸肌向心、离心收缩时峰力矩较高,差异有显著性意义(P＜0.01),训练组左、右两膝在3个速度上的屈肌与伸肌峰力矩比值均低于普通组.结论:跳跃项目训练对青少年膝关节屈伸肌肉力量的增长有良好的促进作用,但在青少年膝关节屈伸肌力协调发展上有所不足,造成屈伸肌比值下降,这也可能是训练方法不当所造成的.
배경:등속측시계통작위일충평개인체기육공능수평적연구방법화수단,재연구중득도료월래월엄범적응용.단운용등속기력측시연구운동훈련대청소년기군발전영향적보도흔소.목적:통과등속기력측시,대장기진행도고、도원계통훈련적청소년화동년령적무훈련자량류인군슬관절기육역량급기특정진행대비분석.설계、시간급지점:대비관찰실험,우2008-10/12재하북성체육과학연구소실험실진행.대상:수궤추취하북사범대학부속중학불삼가훈련적지원자20명작위보통조,추취석가장시체교진행도고、도원훈련적지원자20명작위훈련조,삼시자균위남성.방법:채용Cybex-6000등속측시계통,안조측시요구대삼시자슬관절진행측시,측시순서위선향심후리심.측시속도위만속60(°)/s、중속120(°)/s、쾌속240(°)/s.주요관찰지표:슬관절굴、신기군적상대봉력구.결과:납입실험대상40명,균진입결과분석.여보통조비교,훈련조량측슬관절60,120,240(°)/s굴、신기향심、리심수축시봉력구교고,차이유현저성의의(P＜0.01),훈련조좌、우량슬재3개속도상적굴기여신기봉력구비치균저우보통조.결론:도약항목훈련대청소년슬관절굴신기육역량적증장유량호적촉진작용,단재청소년슬관절굴신기력협조발전상유소불족,조성굴신기비치하강,저야가능시훈련방법불당소조성적.
BACKGROUND:As an effective method to evaluate the muscle functional level in humans,isokinetic testing system is applied in more and more researches.However,reports remain few in which isokinetic muscle strength test is used to study the effect of movement training on the development of muscle groups in teenagers.OBJECTIVE:To make a comparison and analysis on the muscle strength of knee joints between the two different teenager populations of the same age,namely,the one with jump testing and the one without.DESIGN,TIME AND SETTING:A contrast observation was performed at the Laboratory of Hebel Physical Education Science Institute between October and Decamber in 2008.PARTICIPANTS:The 20 volunteers without sport training were selected randomly from Hebei Normal University Affiliated Middle School in Shijiazhuang,and were classified as the control group;the other 20 volunteers with high jump and long jump training were randomly selected from Shijiazhuang Sports School,and were used as the training group.All participants are males.METHODS:Cybex-6000 isokinetic testing system was used to test the knee joints of all participants,with the concentdc contraction going first and then the eccentric contraction.The slow,middle and high testing speeds were 60(°)/s,120(°)/s and 240(°)/s respectively.MAIN OUTCOME MEASURES:Relative peak torque(PT)values of flexor and extensor groups in knee joints.RESULTS:All 40 volunteers were involved in the result analysis.Compared with the control group,knee joints in the training group showed much higher flexor and extensor PT values during the concantric contraction and the eccentric contraction at the speed of either 60(°)/s or 120(°)/s or 240(°)/s,and the difference between the two groups was of significance(P＜0.01).The PT value ratios between flexor and extensor of both the left and the right knee joints were lower in the training group than in the control group at any of the three speeds.CONCLUSION:Jump exercise has a distinctively positive effect on increasing the muscle strength of knee joints in teenagers,while it is limited in the coordinated development of extensor and flexor,leading to the decreased ratios between the two which may be caused by the inappropriate training method.