This study is part of the Empow'her project, which aims to investigate the specificities of female athletes and their potential impact on performance. This field of research offers many prospects, as female athletes are largely under-represented in studies and scientific literature in the field of sports science, even though initial results are emerging 1. Sex hormonal variations (i.e. estrogens, progesterone and testosterone) across the menstrual cycles impact the athletes' wellness 2 such as fitness, mood, sleep quality , menstrual symptoms and training responses 3, 4, 5. Only few studies have measured elite athletes' hormones and currently there is no standards for elite athletes, notably on salivary measures that are easier to collect among elite athletes.