F-58 Free Communication/Poster - Ergogenic Aids III Friday, June 2, 2017, 1:00 PM - 6:00 PM Room: Hall F
PURPOSE: Peppermint oil (mentha piperita) has been shown to have cooling effects in animals and humans, as well as beneficial influences on pulmonary function tests possibly due to bronchodilatory mechanisms. In a previous study in our lab, we found that a single supplementation of one milliliter of peppermint oil mixed in one cup of water significantly raised the ventilatory threshold measured as %VO2max, with no effect on VO2max, in endurance-trained and moderately active men. In this current study, we replicated the methods in recreationally active women and hypothesized that peppermint oil supplementation would increase ventilatory threshold, but not VO2max, in the female population.
METHODS: Ten female participants (age 20.4 ± 0.6 yr) performed two maximal oxygen consumption (VO2max) tests on a cycle ergometer under randomized, single-blind trials of peppermint oil and placebo. For each exercise test, ventilatory threshold was determined by detecting the onset of hyperventilation in the ventilation vs. time curve.
RESULTS: In the recreationally active female population, peppermint oil supplementation had no effect on the ventilatory threshold measured as a percentage of VO2max compared to placebo (peppermint 61.5 ± 4.1 % of VO2max vs. placebo 63.5 ± 2.5 % of VO2max). Additionally, VO2max values were not different between the two conditions (peppermint 36.6 ± 2.1 ml/kg/min vs. placebo 35.8 ± 1.8 ml/kg/min).
CONCLUSION: Our findings suggest that peppermint oil supplementation may not play a significant role in the ventilatory threshold of recreationally active women, despite a significant effect having been observed in age-matched men. The ventilatory threshold phenomenon is complex, and sex differences may explain the inconsistent responses between men and women in peppermint oil supplementation during incremental exercise.