I used to train with weights like a madman when I was younger. Physique shows, the whole bit, I was an isolationist when it came to training muscles. But that was over 10 years ago. Now I train BJJ and while not "strong" I am 215lbs and about 5'11" I have some natural strentgh, I am looking to dabble in some pure core strentgh training with kettlebells. I go to BJJ about 2-3 times a week and do some cardio on 2 other days. I have only been doing BJJ for about 5 months and I now have just enough conditioning to do some strentgh training. At first I was too sore and spent after BJJ, but my body is adjusting nicely now. Anyone have any tips or advice for a novice kettlebeller? How heavy? How long is a workout? How often? What types of sets? I don't want to end up ridiculoulsly sore for BJJ, which is my main focus.