Abstract
The purpose of this study was to clarify running performance for quickness in base stealing. The subjects were 53 male junior high school students， 31 male high school students， 24 male university students， and six professional baseball players， for a total of 114 subjects. The subjects were instructed to steal second base as fast as they could. Their running speed， step length， step frequency，and step width were calculated，and the correlations with base stealing time were investigated. Running speed， step length and step frequency showed significant positive correlations with base stealing time from immediately after starting to steal the base to just before sliding.These results indicated that running faster from the first step is more important than achieving maximum speed soon after starting to run，and it is necessary to improve both step length and step frequency from the first step in base stealing. Players with fast base stealing times tended to have larger step width immediately after starting to steal the base；however，there was no correlation between step length and step width. This result suggested that larger step width was not utilized to increase step length.
https://ror.org/01h2m4f20 
