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Spinning is one of the biggest trends in fitness right now, but it turns out a lot of cycling might not be so good for your vagina.

If you're not careful, the type of cycling done in spin classes can lead to all sorts of problems for your genitals, including saddle sore and vaginitis. One study published in The Journal of Sexual Medicine found that it could even desensitize your vagina, resulting in reduced sensation during sex.