| Research purpose: to develop the upper limb strength of students through sitting pull-down and sitting push,and to explore the effect of repetitive training and alternate repetitive training on upper limb strength training.The first is to observe the changes in the maximum strength of sitting pull-down and sitting push after the intervention of the subjects;the second is to understand the influence of the maximum strength of sitting pull-down and sitting push on the changes in the number of pull-ups;the third is to explore the effects of repetitive training and alternating repetitive training on the upper limbs The training action is mainly the training effect of the working muscles,which provides a certain reference for the strength training of the upper limbs.Research method: This article uses literature data method,experimental method and mathematical statistics method to conduct research.Using experimental methods,32 subjects were divided into repetitive training group and alternating repetitive training group.When training in the repeated training group,first complete the 4 sets of training content of the sitting pull-down(or sitting press)movement,and then perform the 4 sets of sitting press(or sitting pull-down)movement training;when alternately repeat the training group training,complete 1 set of sitting pull-down first(Or sitting press),then do 1 set of sitting press(or sitting pull-down),alternate in turn until all 4 sets of actions are completed.There were 16 people in each group,and they received upper limb strength training twice a week for 8 weeks.Their grip strength,back strength,pull-ups,sitting pull-down and sitting push maximum strength were tested;then sitting pull-down Test the i EMG and RMS indicators of the surface EMG and RMS of the two actions in sitting posture.Use mathematical statistics to process the data and draw conclusions.Research results:(1)Both repetitive training and alternating repetitive training can increase the maximum strength of upper limbs,upper limb strength endurance,and can also increase upper limb muscle area.Among them,the alternating repetitive training group improves upper limb strength endurance better than the repetitive training group.After repeated training experiments,left arm grip strength,right arm grip strength,straight upper arm circumference,pull-ups,sitting pull-down maximum strength,and sitting push maximum strength were 35.69,38.75,27.97,6.25,64.71,46.13,respectively,which were higher than before the repeated training experiment.And there is a significant difference(P<0.05);after the alternating repeated training experiment,they were 36.7,41.59,26.56,9.75,66.3,49.38,which were higher than before the experiment and had a significant difference(P<0.05);(2)Repeat The main working muscles of sitting pull-down training and alternating repetitive training are the biceps,rear deltoid muscles and pectoralis major,while the main working muscles of repetitive training and alternating repetitive training sitting posture are the front deltoid,triceps and pectoralis muscles.Latissimus dorsi.The two training methods of repetitive training and alternating repetitive training can improve the strength of the main working muscles without changing the sitting posture and sitting push down the main working muscles.Among them,the alternating repetitive training group can improve the strength of the biceps brachii in the sitting pull down There is no difference between the lifting and repeated training groups,but the value is better than the repeated training group.(3)On the root mean square value of surface EMG,repetitive training can improve the strength of the pectoralis major,posterior deltoid and biceps in the sitting posture.The RMS are 20.19,22.53,12.82,and alternate repetitive training can Improve the strength of the latissimus dorsi,pectoralis major,and deltoid anterior bundle in the sitting posture,the RMS of which are 15.97,21.20,and 9.65 respectively.It can also improve the pectoralis major,deltoid anterior bundle,deltoid posterior bundle and brachial in the sitting posture.The RMS of the strength of the biceps were 17.94,22.94,24.21,12.95,and the RMS of the above muscles were lower than before the experiment and there was a significant difference(P<0.05);among them,the sitting posture of the alternating repeated training group was pulled down after the experiment.The toe RMS of 9.65 was significantly lower than that of the repetitive training group of 19.49.The two had a very significant difference(P<0.01).In the sitting pull-down movement,the alternating repetitive training group’s strength increased the deltoid muscle toe.The effect is significantly better than the repeated training group.Research conclusions:(1)Both repetitive training and alternating repetitive training can increase the maximum strength of upper limbs,upper limb strength endurance,and can also increase upper limb muscle area.Among them,the alternating repetitive training group improves upper limb strength endurance better than the repetitive training group.(2)The two training methods of repetitive training and alternating repetitive training can improve the strength of the main working muscles without changing the sitting posture pull down and sitting push down the main working muscles.Among them,the alternate repetitive training group sitting down pulls down the middle biceps.There is no difference in the improvement of exertion,but the value is better than that of the repeated training group.(3)Repetitive training can improve the strength of the pectoralis major,deltoid muscles and biceps in the sitting posture.Alternate repetitive training can improve the strength of the latissimus dorsi,pectoralis major,and deltoid muscles in the sitting posture.It can improve the strength of the pectoralis major,anterior deltoid,posterior deltoid and biceps brachii in the sitting posture.Among them,the effect of alternately repeating the training group is obvious in terms of the strength of the deltoid anterior during the sitting pull-down movement.Better than repeated training group. |