Hi, i am from Brazil, first of all I'm sorry for bad English.. We are an online and physical business (female and male, leggings, shorts, fitness clothes..) we aim to achieve nationally and internationally , so the name can not be in Portuguese because in other countries this language is too complicated to talk about, can not be a word in English that is difficult to pronounce . Refusal of only one word , and that can be used for both sexes .
I prefer that you do not " fit" or " fitness " with the name. Here are two brands here from Brazil the same branch of mine that I like very much : "superhot" and "rock code" . Just easy words like this..

Winner

RockWin

by MsBeckerboo

Stone core

by Cecropia