Hi, I was wondering about Ninjitsu training. What is it like in a typical class? I hear it envolves a lot of stricking, throws and grappling. I was wondering, cause I dont have the best knees and back. I been looking for an art to get back into, and found a class that fits in my schedual. I am still pretty fit, but worry about reinjuring myself. I also want something that is pratical and gives me a good workout. Would that be this style? Oh also, I hear that a lot is done from kata, and things are done slow in the class (I emailed the teacher, that is what he told me). Could someone comment on that. Thank you any info on my question and the art in general would be great.