18 786 horse jumps made over 665 obstacles at central Polish jumping events were analysed. Number of knock-downs and run-outs with refusals, as well as the total number of jumps over each obstacle were scored. The results indicate that the obstacles’ size, their order in the track and the way in which sunrays lightened them did not influenc the frequency of run-outs. The obstacle kind, colour and the fact if it was single or in combination, were reflected in the number of knock-downs, run-outs and totals. The presence of advertising elements caused a rise of run-out frequency.

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