AI Article Synopsis
- The study tested how a combination of mouth rinse and topical application of L-menthol affects running performance and sensations in recreational male runners under neutral temperature conditions.
- Twelve runners performed a familiarization run, a control test, and two 10-km trials using either L-menthol or a placebo, showing that while the L-menthol group experienced fresher sensations, their actual running performance improvement was minimal.
- Results indicated that both the L-menthol and placebo conditions led to faster times than the control, but no significant difference was observed between the two active treatments, suggesting that the improvement could largely be attributed to a placebo effect.
Article Abstract
This study investigated the effects of combined mouth rinse and topical application of L-menthol on perceptual responses and running performance under thermoneutral conditions (22 ± 2°C and 30-60% relative humidity). Twelve recreational male runners (age: 31.7 ± 3.8 years; age range: 27-39 years) completed a familiarization, a control test (CON) and two maximal 10-km time trials (counterbalanced randomized crossover design) performed in different days with a non-thermal cooling intervention (combined application of a L-menthol mouth rinse and topical L-menthol gel - MEN) or placebo (PLA). Performance and perceptual measures (thermal sensation, thermal comfort, ratings of perceived exertion and affective response) were recorded for every km completed in the 10-km test. Performance time was lower in MEN ( = 0.03) and PLA ( = 0.003) compared to CON, but no differences were found between MEN vs PLA ( = 1.00). All perceptual responses increased over time in all conditions ( < 0.0001), but only the thermal sensation was lower ( = 0.01) in the MEN compared to CON. L-menthol strategies promote fresh sensations and may improve running performance in 10-km time trial in recreational runners, but the performance improvement could mainly be due to a placebo effect.
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| http://dx.doi.org/10.1080/02701367.2021.2014049 | DOI Listing |
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