Hello I have a background in Muay Thai (many years and fought at inter club level). I have also practiced Japanese Ju Jitsu (6 months) and Krav Maga (2 years). I had to give up Muay Thai as my 40 year old back can't handle the repeated kicks anymore. This is what led me to Krav which allowed me to use many of my Thai techniques but at a much lower intensity so my back survived. I recently gave up Krav as I found it to be a bit too staged and pretend so I have taken up boxing as my hands have always been slow and it brings back the sharpness that being hit properly by a skilled non submissive opponent brings as does trying hit someone who isn't just standing there and taking it Krav gave me an understanding of take downs and groundwork in that I enjoy it and am unfortunately no good at it. I know you should avoid going to the ground in a street situation but seeing as every man and his dog seem to be doing mma these days it seems something to be prepared for. It also taught me that if you're up against someone who knows what they're doing you're stuck. I would quite like to add some ground work, grappling and take downs to my repertoire. My focus is self defence over gradings and competing but my krav experience has taught me that a self defence system doesn't suit me as I quite enjoy a good scrap as part of my training therefore a sport/martial art environment is better for me! I recently tried a wrestling class. I really enjoyed it and the people there were great. However repeated penetration steps have aggravated my knee. I'd also be worried about knees on concrete in a street situation. I'm not completely closed to the idea as enjoyment is as important as anything but my knee does concern me. I also have BJJ (gi and non gi), judo and any other art that you can think of near to me. Does anyone have any opinions on whether judo, wrestling or BJJ would be best suited to taking someone down if, say you were one on one and you were being outstruck and generally be quickly effective on the ground to get back out of the way. There may be other alternatives that I've not considered too. Any advice will be greatly appreciated. Many thanks in advance.