This study examined the effects of peppermint essential oil (PEP) on aerobic capacity. Seven healthy participants performed a graded maximal exercise test following 10-days of ingesting either PEP or a control in a randomised cross-over design. There was no significant difference between control and PEP trials for expired gas variables (̇O 2 peak 3.54 vs. 3.52 L/min) or performance measures (time to exhaustion 583.33 vs. 587.04 seconds). Similarly, resting cardio-pulmonary measures were also unchanged between visits.
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