Over the years I’ve seen plenty of fitness trends come and go. Tae Bo anyone? The fitness industry is always looking for the next trend to sell to the masses who want a quick, easy, and, perhaps most importantly, sexy and entertaining fix. Since I mentioned Tae Bo, it seems group fitness is the worst offender. After all, doing the same dance moves gets boring after a while, no matter how great of a workout the dance moves might be. Beyond group fitness, however, I think