Herrera-Valenzuela, Tomás, Pablo Valdés-Badilla, and Emerson Franchini. “High-Intensity Interval Training Recommendations for Combat Sports Athletes During the COVID-19 Pandemic”. Revista de Artes Marciales Asiáticas 15, no. 1 (March 31, 2020): 1–3. Accessed October 7, 2022. https://revpubli.unileon.es/ojs/index.php/artesmarciales/article/view/6230.