METHODS
This is a prospective observational cross-sectional study performed with
convenience sampling: volunteer women. They signed a free and informed
consent form approved by the Research Ethics Committee of the University
Center of Brasilia (Centro Universitário de Brasília), whose process
number was 1.791779.
The inclusion criteria comprised Brazilian women enrolled in the 2017
Brazil CrossFit® Championship (TCB) who succeeded in the first
selection phase of the championship.
The championship selected 48 female athletes in the main category. The
volunteers in this study were high-performance female athletes,
CrossFit® practitioners for over a year, aged 20 to 34 years, not using
any oral contraceptive. Among them, only eight female athletes accepted
to participate in this research and met the inclusion criteria, which
corresponded to a sample of 16.6%.