Two-dimensional kinematic analysis of catch and finish positions during a 2000m rowing ergometer time trial

Abstract

The kinematic variables of the catch and finish positions of the 2000m rowing techniques in every 500m single ergometer rowing stroke were identified. Five male rowers from the Turkish National Team (Age 21.0±2.0 years; Stature 180.6±3.1 cm; Mass 76.6±5.0 kg; Training experience 7.0±1.0 years), performed a time trial on a Concept IID rowing ergometer. It was recorded by one camera at 100 Hz speed. The 500m, 1000m, 1500m and 2000m rowing strokes were analysed by means of the Simi Motion 6.2 programme. In the catch and finish positions, segments’ angles, stroke time, stroke power, stroke velocity and stroke rate were evaluated by using the Friedman test with repeated measures, followed by Wilcoxon test and Spearman correlation coefficient. Significant differences (p<0.05) for the distance were found for ankle and elbow angles in the catch position; for knee and ankle angles in the finish position; and stroke time, stroke power, stroke rates between distances. For all measured distances, negative correlations were found between stroke power and ankle angle on the finish position. Positive correlations were found with wrist angle on the catch position at 1500m and 2000m. Elite rowers’ performances were not enough to increase the frequency of drive. As the rowing distance got longer, rowers started to change their body angles and action. Performance could be improved by maintaining suitable rowing technique during competition.

Keywords: Biomechanics; Rowing; Catch and finish positions; Concept IID rowing ergometer.