The 400 meter race requires the athletes not only to have good speed quality, but also to have strong speed endurance. Its training has higher requirements for the physiological, psychological, technical, athletic quality and physical distribution of athletes. Speed endurance training is an important part of 400m training. It is an ability for athletes to keep the highest speed to the end. This paper puts forward the training methods of developing speed endurance and some problems worthy of attention.<br>
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