Menthol gel may keep runners cool – no ice needed

This study tested whether a gel containing 4% menthol, applied to the neck, arms, and legs, helps recreational runners feel cooler and perform better in hot conditions. Thirty-seven healthy adults aged 18 to 45 completed two runs, once with the menthol gel and once with a placebo. Researchers measured thermal sensation, body temperature, heart rate, and perceived exertion to see if the menthol gel made a difference.