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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Distribution of distance covered in the Cooper test by placebo and intervention (n = 13). Intervention group: supplementation with 400 mg of nitrates. Placebo group: without nitrate supplementation.