The purpose of this paper is to adjust evaluation of baton exchange during the 4 x 100 m relay after change of rules in 2017. The changeover zone was extended and it is necessary to convert the evaluation for the changeover.
For the women changeover evaluation we found some problematic data. we have to do another research and verify the evaluation scale for the changeover. Between hard data from relay biomechanical analyses and the time for 30 m calculated as the average from the final result we found very interesting conformity. we also define technical key point for the handover.