| （1.Department of Physical Education，，Tsinghua University，Beijing 100084，China；2.Department of Mechanical Engineering，Tsinghua University，Beijing 100084，China) Abstract: Based on latest research achievements in sprint biomechanics, and coupled with several years of experi-ence in sprint training, the authors reexamined several controversial issues about modern sprint techniques, and drew the following conclusions: at starting, the “left foot front and right foot rear” squatting manner can improve athlete’s reaction speed, hitting the starting blocks with both feet can produce more action momentum than hitting the starting block with one foot; at the pure acceleration stage, increasing stride length is more conducive to en-hancing running economy than increasing stride frequency; “swaying” type running is more conducive to increasing acceleration than “straight line” type running; at the midway running stage, the “asymmetrical rebounding tech-nique” produces a ground rebounding force greater than that produced by the “spring-mass technique”; the “5-stage dividing method” can reflect print technical characteristics and optimize full course speed rhythm in a way more accurate than the “4-stage dividing method”.
Key words: competition and training；modern sprint technique；reaction time；action momentum；acceleration；stride width；speed rhythm |
