Increased cardiorespiratory stress during submaximal cycling after ketone monoester ingestion in endurance-trained adults.

The article analyzes the impact of acute ingestion of a commercial (R)-3-hydroxybutyl (R)-3-hydroxybutyrate ketone monoester (KE) supplement on exercise responses and performance in endurance-trained participants. It has been hypothesized that nutritional ketosis induced by actue KE ingestion would decrease indices of cardiorespiratory and perceived stress and improves time-trial performance.