It’s every gym newbies nightmare: opening a list of gym class schedules or training options, only to be faced with a menu of written in an alien language. HITT? LISS? TUT? What’s with all these acronyms anyway?! For some beginners, it’s enough to close the book – literally! – and skip the workout altogether. In this article, we’ll go through some of the most common fitness class types (and their…