The effect of an aid in increasing the efficiency of the heart rate and achieving the 100-meter freestyle swimming. Journal of Humanities and Social Sciences Research, [S. l.], v. 4, n. 1, 2025. DOI: 10.33687/jhssr.004.01.0428. Disponível em: https://jhssrjournal.com/index.php/journal/article/view/428. Acesso em: 10 may. 2026.