Study On The Characteristics Of EMG Changes Of Elite Curling Athletes During Ice Sweeping

Research purpose: To collect EMG signals of elite curling athletes in different types of ice sweeping processes,use the surface electromyography test system to analyze the electromyography signal to discuss the characteristics of muscle exertion during ice sweeping.enrich the theory of curling athletes’ ice sweeping technology,improve the scientificity and pertinence of future special training,and promote the rapid improvement of athletes’ competitive level.Research methods: to test the working characteristics of upper limb muscle groups during each base exercise via ME6000 EMG instrument,select biceps brachii,triceps brachii,anterior and middle bundles of the deltoid muscle,pectoralis major muscle,latissimus dorsi muscle,superior and middle bundles of trapezius muscle for testing,and analyzes the characteristics of muscle exertion in ice sweeping,including the contribution rate of each muscle and the order of muscle exertion.Research Results:1.Sequence of muscle exertion: The middle bundle of the trapezius muscle of the first base closing auxiliary ice sweeper exerts its force first.Second base closing the main ice sweeper’s deltoid anterior bundle and middle bundle first.Third base test 1,the triceps brachii of the closing main ice sweeper is the first to exert force,and the middle bundle of the deltoid muscle of the opening and closing auxiliary ice sweeper is the first to exert force.In the third base test 2,the biceps brachii of the closing main ice sweeper and the opening and closing auxiliary ice sweeper is the first to exert their force.2.In different techniques and different exertions,the discharge amount of each muscle group is different.Triceps brachii is the main part of ice sweeping movement,and the normal ice sweeping strength can best reflect the technical characteristics of athletes.The triceps brachii i EMG(4863.5 Vs)of the first base player accounted for 15.90% of the total test muscles.The i EMG(3841.63 Vs)of triceps brachii of second base players accounted for 30.85%.In test 1 of third base players,the i EMG(3079Vs)of triceps brachii accounted for 24.02% in closed ice sweeping.Triceps IEMG(6047.33 μ Vs)accounted for 25.62% in the opening and closing ice sweeping.In Test 2 for third-base players,biceps brachii was the first to exert force.The i EMG(4481.57 Vs)of biceps brachii accounted for 27.61% in closing ice sweeping.The i EMG(4141.67 Vs)of biceps brachii accounted for 25.21% in opening and closing ice sweeping.Research Conclusion:1.When ice sweeping lightly in each base,the exertion of each muscle will be delayed.And with the increase of sweeping force,the starting speed of each muscle will be accelerated.When ice sweeping heavily,the discharge delay of each muscle will be reduced.And all muscles will be put into work almost at the same time.2.The iEMG of muscles in ice sweeping action from high to low is triceps brachii,deltoid anterior bundle,deltoid middle bundle,and biceps brachii.The work ratio of each muscle of the first base closed vice ice sweeper tends to be consistent.The triceps brachii work rate of the second base closed main ice sweeper is the highest.Third base test 1:When light ice sweeping is carried out,the discharge amount of closing ice sweeping muscles is higher than that of opening and closing ice sweeping muscles.But with the increase of ice sweeping force,the discharge amount of opening and closing muscles exceeds that of closing ice sweeping muscles during normal ice sweeping and re-ice sweeping.In Test 2,the biceps brachii of the third base player had the highest power.When ice sweeping with different strengths,the work ratio of each muscle tends to be consistent.