The idea that shaving legs or body hair keeps you cooler in summer is a common belief, but the evidence suggests otherwise. According to research, human body hair is not dense enough to significantly affect temperature regulation.
A study on mammals indicated that it takes a minimum of 1,000 hairs per square inch of body area for the hair to serve any kind of temperature regulating function. Since the average human hair follicle count is much lower, between 124 and 200 per square centimeter, shaving body hair off doesn’t make a significant difference in keeping you cooler.
In fact, body hair may play a role in the evaporation of sweat, which is a key process in cooling the body. So while shaving might not provide a cooling effect, it can change the sensation on the skin, possibly making you feel subjectively cooler without actually affecting body temperature.
In conclusion, shaving legs or body hair is more about personal preference and aesthetics rather than a means to stay cool in the heat.
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