Abstract: The purpose of this experiment is to study the dynamic depth DL among Chinese male young people and the interrelation of static depth DL anddynamic depth DL. Active depth DL determining apparatus (controlled by electrical means)and adjusting method were again used. 435Ss attended experiment (Ⅱ). The mean of the dynamic depth DL is4.46 sec (arc), SD1.89 sec(arc). The difference between the static and dynamic depth DL is marked butthere exists positive correlation between these two. The regression equation we found is Y=0.29X+3.72.

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