Characteristics of the study participants: A gender-based comparison.

<p><sup>a</sup>Athletes competing at the national level who are eligible to compete in comprehensive competitions and championships held by national sports bureaus and satisfy the criteria. <sup>b</sup>The top 12 competitors who are eligible to compete in comprehensive competitions and championships organized by provincial and local sports bureaus and have been designated as first level athletes. <sup>c</sup>The top 24 competitors who are eligible to compete in comprehensive competitions and championships organized by provincial and local sports bureaus and have been designated as second level athletes.</p> <p>(DOCX)</p>