Postgraduate Program, Catholic University of Brasilia, Águas Claras, Brazil.
Research Center for Human Nutrition (CENINH), School of Nutrition, Faculty of Medical Sciences, National University of Córdoba, Córdoba, Argentina.
J Sports Sci. 2021 May;39(10):1114-1126. doi: 10.1080/02640414.2020.1860361. Epub 2021 Jan 3.
We aimed to develop models to explain performance and pacing during a 10-km running trial.Well-trained runners (n = 27, VO = 62.3 ± 4.5 mL·kg·min) divided into High (HPG, T = 33.9 ± 1.2 min, n = 9) and Low (LPG, T = 37.9 ± 1.2 min, n = 18) performers completed, in different days, the half squat and loaded squat jump (LSJ) exercises (1 day), an incremental test and a submaximal running bout to induce jump potentiation (2 day), and a 10-km time trial (3 day). Pacing was significantly different between performance groups (p < 0.05). The inclusion of mechanical and metabolic variables increased the explained variance in performance (LPG, radj = 0.87, p < 0.001; HPG, radj = 0.99 p < 0.01). Analysis between potentiation and non-potentiation groups revealed significant differences for the speed in the last 400 m (p = 0.02), and in the final RPE (p = 0.03). Performance and pacing can be explained by combining metabolic and mechanical variables and should be controlled by performance level. The relationship between jump potentiation and speed during the last 400 m may suggest that post-activation performance enhancement could be involved in pacing regulation.
我们旨在开发模型来解释 10 公里跑步试验中的表现和配速。经过良好训练的跑步者（n=27，VO=62.3±4.5 mL·kg·min）分为高表现组（HPG，T=33.9±1.2 min，n=9）和低表现组（LPG，T=37.9±1.2 min，n=18），他们在不同的日子里完成了半蹲和负重深蹲跳（LSJ）练习（1 天）、递增测试和亚最大跑步试验以诱导跳跃增强（2 天）以及 10 公里计时赛（3 天）。表现组之间的配速差异显著（p<0.05）。纳入机械和代谢变量可提高表现的解释方差（LPG，radj=0.87，p<0.001；HPG，radj=0.99，p<0.01）。增强组和非增强组之间的分析显示，最后 400 米的速度（p=0.02）和最后 RPE（p=0.03）存在显著差异。通过结合代谢和机械变量可以解释表现和配速，并且应该根据表现水平进行控制。跳跃增强与最后 400 米速度之间的关系可能表明，激活后表现增强可能参与配速调节。
