As there seem to be a fair number of instructors on this forum I thought i would ask for your opinion on mats for training. Last night while practising my niehan shodan kata my to got caught in the join between two mats as i was moving. I now appear to have broken as i have a black throbbing mass at the end of my foot. I know wht my sensei has the mats down, we have a lot of younger students who can be over enthusiastic practicing takedown techniques. My old sensei never used mats and i found this much better for movement. So back to my question, Do you use Mats or not?