Blödorn Wolfgang, Döring Frank
, Lindenstraße 2, 24211, Preetz, Germany.
Institute of Human Nutrition and Food Science, Department of Molecular Prevention, Christian-Albrechts-University of Kiel, Heinrich Hecht-Platz 10, 24118, Kiel, Germany.
BMC Res Notes. 2025 Apr 26;18(1):196. doi: 10.1186/s13104-025-07256-6.
The coefficient of special endurance (KsA) is a metric that quantifies the relative pace loss between two consecutive distances (e.g., 100 m/200m). Here, we analyzed over 20,000 race times to determine KsA values for female runners across seven distance pairs from 100 m to 10,000 m. The data analyses are based on multiple official performance rankings at international to regional levels, exclusively compiled and processed for this study.
The KsA values obtained have remained stable for over four decades in national-level female runners and are applicable from world-class to regional levels. A sex-based analysis reveals that females undergo a more pronounced decrease in pace from 100 m to 1500 m in comparison to males. These sex differences in special endurance align with known variations in muscle fiber composition and fast-twitch type II fiber characteristics between males and females. In conclusion, we provide statistically valid KsA reference values for female runners from 100 m to 10,000 m. These values have practical implications for coaches and athletes seeking to assess runners' strengths, weaknesses, potential, and specific talents based on race times. Sex differences in KsA values may reflect muscle physiology and guide future research on KsA and muscle function.
专项耐力系数（KsA）是一种量化两个连续距离（如100米/200米）之间相对配速损失的指标。在此，我们分析了20000多个比赛成绩，以确定100米至10000米七个距离组合的女性跑步者的KsA值。数据分析基于国际到地区层面的多个官方成绩排名，这些排名是专门为本研究汇编和处理的。
在国家级女性跑步者中，获得的KsA值在四十多年来一直保持稳定，并且适用于从世界级到地区级的水平。基于性别的分析表明，与男性相比，女性从100米到1500米的配速下降更为明显。专项耐力方面的这些性别差异与已知的男性和女性之间肌肉纤维组成以及快肌II型纤维特征的差异相符。总之，我们为100米至10000米的女性跑步者提供了具有统计学有效性的KsA参考值。这些值对于寻求根据比赛成绩评估跑步者的优势、劣势、潜力和特殊天赋的教练和运动员具有实际意义。KsA值的性别差异可能反映肌肉生理学，并为未来关于KsA和肌肉功能的研究提供指导。
