Recently, I sparred with a current UFC fighter. Now, normally when I spar, I don't have a lot of problems whether or not I am tense, I tend to be able to loosen up and land a couple good combos here and there and leave satisfied. However, this guy is on a different level entirely, obviously. I went 3 rounds with him, the first one wasn't very good, but not terrible. Second one was decent. Third one I took a straight from hell. What both my coach and he said is that I was too square, too tense... I don't quite understand what they meant because I'm definitely not "tense" muscle wise... I'm just not moving I guess, even though I'm making a conscious effort to do it. I don't feel nervous, I have no qualms about taking on semi-concussions learning the stuff, but I'd really like to know what some of you (advanced strikers, not keyboard jockeys) do to stay relaxed, fluid, and focused. Also, what are some good strikers (mma please, boxing too if applicable style) I can study and take from?