Okay, this topic is tangential to MA, so I figured this was as good a place on MT as any... I've considered picking up a fitness certification or two along the way. A few reasons for wanting one: better knowledge for helping students with fitness, improve some of what we do in in-class exercises, and maybe be able to offer an occasional class where certifications are required (and always preferred). Of course, it might even help with some marketing along the way some day. I'm leaning toward kettlebell, because it's become my favorite strength training. There are plenty of places that will offer certification online, most of which are probably meaningless (except for marketing and satisfying the "you must have a certification" requirement). I'm looking for suggestions. Of course, like most folks, I'd prefer cheap and excellent, knowing those two rarely go together. More importantly, I'd like to not end up with expensive and worthless. I'm mostly interested in strength focus, so would prefer certifications that lean that way. I'd prefer any that have online training, as well as the actual certification course. Any suggestions?