In this article written in English by Benjamin Holfelder et al., the authors explain that, in order to achieve world-class performances, regular performance diagnostics is required as an essential prerequisite for guiding high performance sport. The results of this study suggest that lactate tests in swimming specifically have to consider the lactate affecting factors sex and distance under consideration of the time period between measurements.

The authors delve into this issue in the abstract of the article, which you can find at https://www.laktate.com/en/information/lactate-in-the-sports-field/the-influence-of-sex-stroke-and-distance-on-the-lactate-characteristics-in-high-performance-swimming/, where you will also find a link to the original article.