Needles Bradley J, Grabowski Alena M
Applied Biomechanics Lab, Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States.
J Appl Physiol (1985). 2024 Dec 1;137(6):1690-1698. doi: 10.1152/japplphysiol.00610.2024. Epub 2024 Nov 19.
Elite distance runners have exhibited race time improvements since the 2020 introduction of advanced footwear technology (AFT) for track and field, also known as "super" spikes. The observed performance improvements may be due to changes in midsole compliance, which could affect leg stiffness while wearing AFT spikes. Since increased leg stiffness has been associated with running speeds greater than 6 m/s, race time improvements for elite distance runners wearing AFT spikes may be reduced at faster running speeds. To investigate the relationship between the use of AFT spikes, running speed, and race performance, we conducted a statistical analysis of the race times from the top 100 male and female elite runners for 800-m to 10,000-m events from 2001 to 2023. We calculated race performance improvement (RPI) as the percentage difference between the pre-AFT spike (2001-2019) regression equation predicted average race times from the top 100 athletes and actual average race times from the top 100 athletes for 2021, 2022, and 2023. Overall, RPI after the introduction of AFT spikes was 0.89 ± 0.58% (range: 0.22-2.03%; < 0.001) or roughly 1.2 s faster per kilometer than predicted by the regression equations. In addition, average running speed is faster as race distance decreases and we found that RPI was negatively associated with running speed from 10,000-m to 800-m ( < 0.001). Although overall race performances have improved since the introduction of AFT spikes, the use of AFT spikes may disproportionately improve race performance based on running speed. After accounting for historical race time trends, average race times from the top 100 elite male and female athletes competing in the 800-m to 10,000-m events have improved since the introduction of advanced footwear technology spikes. However, the percentage performance improvement is smaller at faster average running speeds. Thus, future research is warranted to determine the interaction of footwear compliance, running speed, and performance for elite runners.
自2020年田径项目引入先进鞋类技术(AFT)(也称为“超级”钉鞋)以来,精英长跑运动员的比赛成绩有所提高。观察到的成绩提高可能归因于中底柔韧性的变化,这可能会影响穿着AFT钉鞋时的腿部刚度。由于腿部刚度增加与超过6米/秒的跑步速度相关,穿着AFT钉鞋的精英长跑运动员在更快的跑步速度下比赛成绩的提高可能会减少。为了研究AFT钉鞋的使用、跑步速度和比赛成绩之间的关系,我们对2001年至2023年800米至10000米项目中排名前100的男女精英运动员的比赛时间进行了统计分析。我们将比赛成绩提高(RPI)计算为2021年、2022年和2023年AFT钉鞋使用前(2001 - 2019年)回归方程预测的前100名运动员的平均比赛时间与前100名运动员的实际平均比赛时间之间的百分比差异。总体而言,引入AFT钉鞋后的RPI为0.89±0.58%(范围:0.22 - 2.03%;P < 0.001),即每公里比回归方程预测的速度快约1.2秒。此外,随着比赛距离的缩短,平均跑步速度更快,并且我们发现从10000米到800米,RPI与跑步速度呈负相关(P < 0.001)。尽管自引入AFT钉鞋以来总体比赛成绩有所提高,但AFT钉鞋的使用可能会根据跑步速度不成比例地提高比赛成绩。在考虑历史比赛时间趋势后,自引入先进鞋类技术钉鞋以来,参加800米至10000米项目的前100名精英男女运动员的平均比赛时间有所改善。然而,在更快的平均跑步速度下,成绩提高的百分比更小。因此,有必要进行未来研究以确定精英跑步者鞋类柔韧性、跑步速度和成绩之间的相互作用。