Research On The Relationship Between The Stability Of Guns And The Fatigue Of Air Pistol Athletes

Purpose:This study analyzed the correlation between the stability of the central nervous system and the changes in visual fatigue.To provide a theoretical basis for improving gun stability,improving training content,and improving athletic performance.Methods :Seven members of the training team in the Anhui Shooting Center pistol class,including three female athletes and four male athletes,volunteered to participate in the experiment.According to the air pistol rules and standards,the athletes collected the flash fusion frequency,reaction time and visual depth index before and after the competition,and used the heart rate strap to record the heart rate variability of the tested athletes during the competition.The stability was measured by the Scat Shooter laser shooting system.data.The data was statistically analyzed using spss20 software,and the data was expressed in the form of mean plus or minus.The correlation between the measured number of rings and the stability index of the gun,the number of rings and heart rate variability,the heart rate allergic index and the stability index of the gun using spearman correlation;the flash fusion frequency of the test before and after the simulation game Center-fatigue indicators such as response time,visual depth,1s length,and LF/HF were paired t-test;the difference between the groups of ring number,0.1s length,SDNN,and RMSSD was verified by rank sum test.Results:1.The number of rings in the third group(92.71±3.04)was significantly lower than that in the second group(95.00±2.16)(P<0.05).The number of rings was negatively correlated with the 0.1s length before the firing,and the correlation was extremely significant(r=-0.328,P<0.01).The number of rings was negatively correlated with the 1s length before the firing,and the correlation was Significant(r=-0.123,P<0.05);the number of rings was positively correlated with the ten-ring coverage,and the correlation was extremely significant(r=0.301,P<0.01).In the 10-ring and non-tenth ring groups,the non-circle ring group(123.332±31.793)of the 1s length was significantly higher than the ten ring group(129.485±31.099)(P<0.05);the 0.1s lengtht non-tenth ring group(10.103±5.47)was significantly higher than the ten-ring group(7.471±5.201)(P<0.01);the 10-ring coverage of the non-tenth ring group(0.337±0.208)was significantly less than the ten-ring group(0.466±0.208)(P <0.01).2.The third group of data of the SDNN in the heart rate variability index(61.19±41.98ms)was significantly higher than the second group(54.83±40.43ms)(P<0.05);the third group of LF/HF data(3.60±2.11 Hz)was significantly lower than the second group(4.28 ± 1.92 Hz)(P<0.05).After experimental research and analysis,it is found that among the seven athletes participating in the test,the decrease of the flashing frequency of the four athletes reached the defined range of brain fatigue(?0.5HZ),but the change of the pre-and post-test changes did not have significant difference(P>0.05).There was no significant difference in the change before and after the test(P>0.05).After the depth test(1.96±0.55 mm)was significantly higher than before the test(0.84 ± 0.49 mm)(P < 0.05).3.The SDN was positively correlated with the 1s length before the firing(r=0.45,P<0.01);RMSSD was positively correlated with the 1s length before the firing and was highly significant(r=0.412,P<0.01).LF/HF was negatively correlated with the 1s length before the firing,and was significant(r=-0.388,P<0.05);SDNN was moderately negatively correlated with the 0.1s length before the firing,and was extremely significant(r=-0.46,P<0.01);RMSSD was moderately negatively correlated with the 0.1s length before the firing and was extremely significant(r=-0.42,P<0.01);SDNN was positively correlated with 10-ring coverage and was highly significant(r=0.583,P<0.01);RMSSD was moderately positively correlated with 10-ring coverage and was highly significant(r=0.538,P<0.01).Conclusions:1.The 0.1s length and 10 ring coverage in the gun stability index are important factors affecting the shooting performance;2.There is a central fatigue trend in the air pistol simulation game,and the visual depth change is more sensitive than the flash fusion frequency change;3.Simulation game center rate variability index LF/HF is one of the factors affecting shooting performance;4.The heart rate variability such as SDNN,RMSSD,LF/HF can reflect the stability of the gun in the aiming stage of the air pistol athlete to some extent.