I am 5'6 without shoes and I do Latin dance. A pro I know, is helping me buy my Latin shoes and she highly recommends that I switch to 3 1/2-inch slim heels as the usual 3-inch slim heels that I normally wear is not available. Flare heel is a no-no for me. She claims it will look great and make me work harder, which I know is true but is this height actually safe for dancing long hours? I used to have a pair of practice shoes, much like the men's shoes but now as I train regularly for competitions, I am almost always dancing in my 3-inch shoes. I don't whether it's the old minor injury, shoes or dancing that gives me slight discomfort at the lower back whenever I am done dancing. Walking on streets or for activities as such, I sometimes even wear 4 1/2 or 5-inch heels and I don't feel anything, save for the occasional blister. Dancing is a whole different thing, isn't it? I am just concerned and hoping to get some advice here.