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Iñigo San Millán and George A. Brooks declare that they have no conflicts of interest that are directly relevant to the content of this letter.
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San-Millán, I., Brooks, G.A. Authors’ Reply to Monferrer-Marín J, et al.: Assessment of Metabolic Flexibility by Means of Measuring Blood Lactate, Fat, and Carbohydrate Oxidation Responses to Exercise in Professional Endurance Athletes and Less-Fit Individuals. Sports Med 52, 2011–2012 (2022). https://doi.org/10.1007/s40279-022-01656-5
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DOI: https://doi.org/10.1007/s40279-022-01656-5