Messias Leonardo Henrique Dalcheco, Sousa Filipe Antônio de Barros, Dos Reis Ivan Gustavo Masseli, Ferrari Homero Gustavo, Gobatto Claudio Alexandre, Serra Camila Caputo Saldanha, Papoti Marcelo, Manchado-Gobatto Fúlvia Barros
School of Applied Sciences, University of Campinas, Limeira, Sao Paulo, Brazil.
University of São Paulo, School of Physical Education, Bandeirantes, Ribeirão Preto, São Paulo, Brazil.
PLoS One. 2018 Feb 28;13(2):e0192835. doi: 10.1371/journal.pone.0192835. eCollection 2018.
This study was divided into two complementary parts. In Part 1, we proposed a novel paddle strokes analysis based on the force signal from a 30-s all-out tethered test; and compared these results with video recordings. In Part 2, we investigated the relationship between force data from the same test with paddle stroke results from both methods. Eleven male elite slalom kayakers (Brazilian national team) were evaluated. The tethered test was conducted for force parameters analysis (peak-force, mean-force, impulse). Video recording analysis was conducted, and the performed strokes (V.NumberPaddle) was counted and frequency (V.FrequencyPaddle) calculated by the V.NumberPaddle divided by 30 (i.e. total time of test). The new method consisted of performed strokes and frequency achievement from a load cell force signal analysis (S.NumberPaddle and S.FrequencyPaddle, respectively). Paired test-t did not show difference between methods results, but significant correlations were only obtained for the number of paddle strokes. Force parameters were only correlated with S.NumberPaddle and S.FrequencyPaddle. Overall, considering the theoretical and practical application, we propose that the new method should be used as an alternative to the video recording.
本研究分为两个互补部分。在第一部分中，我们基于30秒全力系留测试的力信号提出了一种新颖的划桨动作分析方法，并将这些结果与视频记录进行了比较。在第二部分中，我们研究了同一测试中的力数据与两种方法的划桨动作结果之间的关系。对11名男性精英激流回旋皮划艇运动员（巴西国家队）进行了评估。进行系留测试以分析力参数（峰值力、平均力、冲量）。进行视频记录分析，统计执行的划桨次数（V.NumberPaddle），并通过V.NumberPaddle除以30（即测试总时间）计算频率（V.FrequencyPaddle）。新方法包括通过称重传感器力信号分析得出的执行划桨次数和频率（分别为S.NumberPaddle和S.FrequencyPaddle）。配对t检验未显示方法结果之间存在差异，但仅在划桨次数方面获得了显著相关性。力参数仅与S.NumberPaddle和S.FrequencyPaddle相关。总体而言，考虑到理论和实际应用，我们建议将新方法用作视频记录的替代方法。
