A Study On Neuro-muscular Characters Of Rowing Athletes With High Level In Pull Tache

As a fashionable aquatic sports, the crucial technology track of rowing—pull has a direct impact on tournament results. In the light of the status quo of the project, researchers make a thorough investigation on Kinematics, Kinetics or Physiology generally, while not available references yet. So this paper, from kinematics and electrophysiology this two perspectives, mainly study neuro-muscular characters of higher level athletes when doing pulling of rowing on ConceptⅡ. the purpose of this paper is to find the relationship between center and periphery neural system and muscular contract during ergometer rowing, and make a reference for finding specific training in the future so as to instructor athletes.The experiment choose five master sportsmen of rowing in the center of aquatic sports in shanghai as subjects, using camerals of SONY-HDR-FX1E and BIOVISION EMG acquisition system to make an experiment on pull of rowing on Concept II simultaneously, though collecting EMG signal of eight muscles mainly, and combining them with some kinematic paramaters such as angle and angular velocity of knee, hip, elbow etc. The paper make a comprehensive analysis of sEMG information of various muscles, and furtherly infer the neuro-muscular characters of athletes.Though comprehensive analysis of sEMG and Kinematics, the paper mainly sum up the following recommendations:Firstly, for cyclical movement such as rowing, from whatever kinematic or electromyographic perspective, a variety of muscles will keep a coordination of strike sequence when completing the pull technic of rowing on ConceptⅡ, they will keep to the following principle, that is large Muscle Groups drive small Muscle Groups in exertion.Secondly, in the course of pulling, the various body segment show its exertion in turn:the back muscles, for example, erector spinae is preactivated firstly, then muscles from leg and other muscles from back will contract vigorously. As all these contractions are to be end, lastly muscles from elbow will exert enough, so as to maintain the stretch of leg and trunk continuously and complete the final pull. During tis period, the variance between joint angle and angular velocity of knee and hip stay the same basically, it changs mainly in the middle phase of pull. While the variation trend of elbow is different from them, which changs mainly after 60 percent of the time period of pull in rowing.Thirdly, from the result of change of angular velocity of three joints, we make certainty that the pull of rowing on ConceptⅡraise power steadily in the whole process, which is from actively stretch of leg to extension of back, and then to bend of elbow. Lastly, erector spinae makes a bigger contribution to the pull of rowing, compared with any other tested muscles, then biceps brachii of arms and lastly muscles of lower limb,especially biceps femoris and anterior tibialis have the smallest impact,while the activity of rectus femoris exists in the whole process.Though the study, the author suggest that in the future training, athletes should pay more attention to main muscles such as erector spinae, biceps brachii and rectus femoris, medial head of gastrocnemius etc, further more, in view of different training of various muscles, the trainer should choose specialtraining methods in order to achieve outstanding performances in the competition.