Haha, nah. Just amateur boxing, and I'm still pretty new to the sport.
Naoto in female clothing is actually...odd. Especially in a skirt. She looks like your typical boring anime girl, so I feel like the masculine clothes kind of defines her as a character and reflects her personality better. Though I actually really like the clothes she wears in the new ending of Golden, she looks more like an adult which fits.
Speaking of clothing though, after seeing Naoto's outfits that she gets in Golden...I actually wish she was a guy. I don't like my favorite character in a high-cut battle armor and some cat halloween costume as fanservice for the creepy fans. x_x (She did get a Sherlock Holmes outfit so that more than makes up for these, though.) Kanji's are great though.