| (Department of Physical Education, Guangzhou Institute of Physical Education, Guangzhou 510075,China) Abstract: On the basis of consulting literatures and investigating,the paper has analyzed a good many points through theoretical and practical method,and considered that:The original motive force of the body horizontal acceleration is the folding and swinging of the swinging leg and the treading of the supporting leg coordinate timing; supporting and swinging affecting each other and playing an important role in different phases; raising the speed and the lengths of the swinging is the decisive factor in sprint.
Key words: sprint technique; supporting motive force; swinging motive force
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