Pace distribution during ultra-trail marathon.



Year of publication 2013
Type Conference abstract
MU Faculty or unit

Faculty of Sports Studies

Description The purpose of this study was to determinate difference between pace changes during ultra-trail marathon and performance level. We divided the course of the Brnensky masakr (trail ultramarathon, length 61 km and 1984 m of positive altitude change, September 21st 2013) into twelve 5-km segments (last one-kilometre was excluded). Twenty-nine finishers (men category; 198 runners finished race) were used with GPS devices (Garmin Forerunner 910 XT) to record their position. Subjects were divided into 3 groups (A faster runners, n=10; B moderate, n=10; C slowest, n=9) by finishing time. Runners’ speed (RS) was normalized as ratio of stage and overall speed (RS > 1 means slower speed in segment of course than overall speed). ANOVA was used to identify difference between groups, there was found interaction (group * split; < 0.05). Values of normalized RS were in range of 0.67 (B group, 10-15 km) and 1.34 (B group, 5-10 km). RS is generally linked with elevation changes and technical difficulties of the trail race. Biggest difference between groups on single part of course was found between 30 and 35 km (A=1.12; B=1.18; C=1.25) and smallest difference was in the first 5 km (A=0.86; B=0.86; C=0.84). In spite of the fastest part (10-15 km) and the slowest part (5-10 km) of the race, first part of course has tendencies to been run faster than the second one. No other patterns in pace distribution between different performance levels were found.

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