The Influence Of The Anaerobic Working Capacity Of Limbs On The Potential Speed Of Running 400-m Under Fatigue

This thesis is to investigate the influence of the change of the speed pattern of athlete's 400-m run and the anaerobic working capacity of Athlete's limbs on the running speed, therefore provides theoretical scientific support to the athlete's training. The author uses the methods of literature review, experiments and statistics to complete this study. The data used in this paper is collected by using high speed camera and cycle ergometer to study 12 male athletes, whose speed of 400-m running is 50.09±1.96s, and Wingate method to test their limbs. After analyze the data, the author finds out: (1)athletes start to slow down after 60-90m while completing 400m and the decline of the speed is drastic. Therefore, it is more reasonable to call this speed decline instead of speed decline during the last part. (2)The reason of the speed decline is because athletes could not maintain the pace. Therefore the focus when training athletes should be keeping pace under fatigue. (3)The relativity of the speed during 60m and 160m and athlete's final result i(sr=-0.55,p>0.05;r=-0.42,p>0.05).The relativity of the speed during 260m to 360m and athlete's final result is (r=-0.85,p<0.01;r=-0.93,p<0.01). The speed of latter part influences athletes' final result more than the influence of the former part. Therefore, if athletes try to slow down the decline of their speed during the latter part of the running, it will help them to achieve better results. (4)The influence of the decline of the lower limb's anaerobic power during the first 60m is r=-0.71(p<0.05)and during 260-360m is r=0.70(p<0.05). The influence of the decline of the upper limb's anaerobic power during the first 60m is(r=-0.70,p<0.05)and during 260-360m is r=0.89(p<0.01). The result shows that the higher level of athlete's anaerobic power is, the faster athlete's speed is during the later part of the running. This means that if athlete controls the running speed during the first half of the running, the athlete can achieve higher speed during the latter half.(5)The swing of the upper limbs help to keep athlete's pace. The anaerobic power of the upper limbs help to decrease the decline of the speed during latter part of 400m. (6)The highly developed ability of limbs to avoid fatigue helps athlete keeps speed during the later part of the running under fatigue. There is no evidence that the more developed of limbs' anaerobic power helps to maintain the speed better during the latter part of the running.