You can wear a loose shirt over your sports bra or some other type of top to cover up if you are uncomfortable. Trainers, in any sport should not touch you inappropriately in any manner that makes you uncomfortable. I took Judo growing up and a lot of girls I knew took the same class as well as kickboxing and I've never heard or seen them have any inappropriate contact with a coach, teacher or trainer.
Try and find a reputable gym in your area see if there are classes for girls only or with other girls in a group so you aren't the only one.
OMG what a stupid Q
let them touch you. its ok
Hi, i'm 14 and am currently living in Asia. I'm tall and blonde and everywhere I go I get hit on, which makes me feel really uncomfortable. I really want to try kickboxing because I want a self defense sport and I think it will be a lot of fun, but all the trainers are mostly American guys. Your outfit has to be a sports bra and sport shorts and I watched some videos and they always like touch their clients, not unprofessionally, but I still think it would make me uncomfortable.