Research Upper Limb Fatigue And Surface Electromyography Variation Electronic Sports Players Mouse

Objective:The application methods of electrical technology monitoring e-sport players in40minDOTA (an e-sport game，mainly is the mouse to click operation) before and after the gamewhen the mouse operation upper limb muscle fatigue state， and to explore applicability ofelectrical frequency domain analysis in fatigue and the suitability of selecting indicators， inorder to prevent this type of management of occupational chronic strain of upper limbmuscles provide certain reference basis.Methods:In15DOTA E-sports athletes as the research object to reaction time of40min DOTAmovement before and after the intervention，the finger flexibility，grip strength and enduranceload when finger flexor and Extensor of shrinking and the trapezius muscle (sEMG)multi-channel sEMG related fatigue test and record in the process of the endurance loadsubject subjective fatigue feeling. sEMG mainly the frequency domain analysis the indexsystem is divided into sEMG points of original signal processing analysis and sEMG analysison time. Before120s per6s for a section marked a total of20section using the softwarecomes with standard methods of electric report (standard EMG report) was carried out on theelectromyographic signal spectrum/fatigue (frequency/fatigue report) data processing andanalysis; On the basis of the30s as a period of emg average can be divided into four periodof analysis processing compare in the four stages of multi-channel sEMG electrical frequencyand Extract the changing trends of the mean power frequency (MPF) and median frequency(MF) index，sEMG data are derived，respectively to deal with the indicators，and linearregression to ensure the slope intercept and mutation rate，etc.Results:1. Compared with before exercise，DOTA movement significantly longer reaction time afterthe intervention (p <0.05)，increase response error. Finger flexibility time growth，but therewas no significant difference. No obvious change in grip strength before and after exercise.2. In the process of DOTA movement observed， refers to the shallow flexor and Extensor， trapezius muscle electromyographic signal values are less than the muscles of muscularcontraction10%maximum voluntary contraction electromyography.3. Compared with60%MVC endurance load the electromyographic signal，25%MVCendurance load electrical frequency domain index on the median frequency of MF andaverage power spectrum MPF change percentage is relatively stable.4.40min DOTA before and after exercise endurance load process index finger， flexormethods of electromagnetic amplitude were increased with the Extension of time， butcompared with before， there was no significant difference (p <0.05). Trapezius musclemethods of electric amplitude changes irregularly.5. With25%MVC endurance load fatigue states of finger flexor and Extensor found: DOTAbefore and after exercise， refers to the shallow flexor，refers to the frequency domainmulti-channel semg of Extensor index the median frequency of MF and average powerspectrum of the MPF slope decreased，all show the endurance load2min MF and MPF slopedownward trend， but no significant difference (p <0.05);1min refers to the Extensorsignificant difference (p <0.05);(start in the first time within the first30s) refers to theshallow flexor， refers to the slope of Extensor frequency multi-channel semg fell the mostobvious and significant difference (p <0.01)， and the rest3times the slope change isrelatively stable. Trapezius muscle frequency multi-channel semg change of slope instability，the increase in decreases.6. In June and25%MVC endurance under the load of electrical tests found that comparedwith the former DOTA movement，movement refers to after Extensor (ED) refers to Extandshallow flexors (FDS) a decrease in the initial frequency of multi-channel semg.Conclusion:1.40min DOTA movement process the high frequency of the mouse operation can cause theoccurrence of finger flexor and extensor muscle fatigue.2.25%MVC contraction is more suitable for evaluating refers to stretch, caused by the clickof a mouse quickly and flexor muscle fatigue.3. Frequency domain analysis：especially in the initial drop in frequency is suitable forevaluation of low load, high frequency mouse operation index of trigger finger muscle fatigue. Show the MF and MPF slope decreases obviously, the initial frequency dropped significantly.