Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Peppermint oil has been investigated for its potential to enhance athletic performance and exercise capacity, primarily due to its effects on respiratory function and perceived exertion. Several small-scale studies suggest that peppermint oil, when ingested orally or inhaled, may improve certain exercise parameters. For example, a 2013 study published in the "Journal of the International Society of Sports Nutrition" found that oral administration of peppermint oil (0.05 mL in water) for ten days improved exercise performance, spirometric measurements, and respiratory rate in healthy male students. The proposed mechanisms include relaxation of bronchial smooth muscles, increased ventilation, and a reduction in perceived fatigue, possibly due to the menthol component’s cooling effect and ability to modulate the sensation of airflow. Inhalational use of peppermint oil has also been shown to reduce feelings of fatigue and increase alertness in some trials, which may indirectly benefit athletic performance. However, most studies are small, short-term, and sometimes lack rigorous blinding or placebo control. The overall evidence base remains limited, and findings are not always consistent across populations or exercise modalities. In summary, while there is some preliminary scientific evidence supporting the use of peppermint oil as an exercise aid, particularly regarding subjective feelings of energy and improved respiratory parameters, the evidence is not robust or widespread. More large-scale, high-quality studies are needed to confirm its efficacy for athletic performance enhancement.

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