Alves Miriam, Barbosa Tiago M, Paulo Vilas-Boas João
Centre of Research, Education, Innovation and Intervention in Sport (CIFI2D), Portugal; Porto Biomechanics Laboratory (LABIOMEP-UP), Portugal; Faculty of Sport, University of Porto, 4099-002 Porto, Portugal.
Department of Sport Sciences, Instituto Politécnico de Bragança, 5300-252 Bragança, Portugal; Research Centre for Active Living and Wellbeing (LiveWell), Instituto Politécnico de Bragança, 5300-253 Bragança, Portugal.
J Biomech. 2024 Dec;177:112390. doi: 10.1016/j.jbiomech.2024.112390. Epub 2024 Oct 28.
This study aimed to compare active drag (D), coefficient of hydrodynamic force (C) and, total external mechanical power (P) between two breathing patterns in breaststroke: breathing every stroke versus every two strokes. A 6-week intervention program was conducted. Fifteen swimmers carried out two all-out bouts of 25 m using the velocity perturbation method in each breathing pattern. The study analyzed the swimmers' velocity (swimming freely and with the towed body), D, C and P. Individual data analysis revealed that 40 % of the sample experienced a decrease in D when breathing every two strokes, with some achieving higher velocities. Conversely, nine swimmers exhibited lower D values while breathing every stroke, with six of them also showing higher velocity values compared to breathing every two strokes. When comparing the pooled sample using paired t-tests, no differences were found in D, C and, P between the two breathing patterns. Furthermore, using ANCOVA analysis, results indicated that neither sex nor swimming velocity influenced the variables studied.
本研究旨在比较蛙泳两种呼吸模式（每划水一次呼吸一次与每两划水一次呼吸一次）之间的主动阻力（D）、水动力系数（C）和总外部机械功率（P）。开展了一项为期6周的干预计划。15名游泳运动员在每种呼吸模式下采用速度扰动法进行了两次25米的全力冲刺。该研究分析了游泳运动员的速度（自由游泳和拖曳身体时的速度）、D、C和P。个体数据分析显示，40%的样本在每两划水一次呼吸时D值降低，其中一些人的速度更高。相反，9名游泳运动员在每划水一次呼吸时D值较低，其中6人与每两划水一次呼吸相比速度值也更高。使用配对t检验比较合并样本时，两种呼吸模式在D、C和P方面未发现差异。此外，使用协方差分析，结果表明性别和游泳速度均未影响所研究的变量。
