Nielsen Anders, Heyde Christian, Simonsen Morten Bilde, Larsen Ryan Godsk, Hansen Rasmus Kopp, Kersting Uwe, Zee M De, Brund René Børge Korsgaard
Sport Sciences, Aalborg Universitet, Aalborg East, Denmark.
Future Sport Science Team, Adidas AG, Herzogenaurach, Germany.
Int J Sports Med. 2022 Dec;43(13):1113-1117. doi: 10.1055/a-1820-7023. Epub 2022 Aug 4.
The purpose was to investigate differences in reliability of running economy measurements between familiar and unfamiliar shoes. Thirty-seven runners were included who all ran in familiar and unfamiliar running shoes while running economy was measured at steady state using a treadmill. Each participant was tested on two different visits (three sessions in total), with two trials in each of the three shoe conditions completed at each visit. Coefficient of variation, standard deviation of differences, and limits of agreement of running economy were used to quantify the repeatability (within-visit variation) and reproducibility (between-visit variation). The coefficient of variation showed a marginal difference in reproducibility across shoe conditions, whereas no differences were seen in coefficient of variation, standard deviation of the differences, or limits of agreement for repeatability across shoes. All three shoe conditions showed greater repeatability than reproducibility for running economy, and enhanced repeatability at visit 3 compared to visit 2. Our results indicate that familiarisation to shoes might not be needed for reliable measurements of running economy. Based on our results, when evaluating benefits in running shoes we suggest that running economy be assessed within the same day. Further, our data suggest a beneficial effect of using multiple familiarisation sessions if small differences between shoe conditions are expected.
目的是研究穿着熟悉和不熟悉的鞋子时跑步经济性测量的可靠性差异。纳入了37名跑步者，他们在使用跑步机以稳定状态测量跑步经济性时，分别穿着熟悉和不熟悉的跑鞋跑步。每位参与者在两次不同的访视中接受测试（总共三个阶段），每次访视在三种鞋子条件下各完成两次试验。使用变异系数、差异标准差和跑步经济性的一致性界限来量化重复性（访视内变异）和再现性（访视间变异）。变异系数显示在不同鞋子条件下再现性存在微小差异，而在不同鞋子间的变异系数、差异标准差或重复性的一致性界限方面未观察到差异。对于跑步经济性，所有三种鞋子条件下的重复性均高于再现性，并且与第2次访视相比，第3次访视时重复性有所提高。我们的结果表明，对于可靠的跑步经济性测量可能不需要适应鞋子。基于我们的结果，在评估跑鞋的益处时，我们建议在同一天内评估跑步经济性。此外，我们的数据表明，如果预期鞋子条件之间存在微小差异，使用多次适应阶段会有有益效果。
