RELAX! Jiu-Jitsu training involves and exposes the student to live training also called "rolling" in which you and your partner attempt to apply techniques in order to submit or "tap out" one another. Which if you think about is pretty close to what might happen in a real street fight. However the removal of some of the more extreme elements i.e. biting, eye gouges, groin strikes, hair pulling and even at times kicking and punching allows the student to be able to partake in such live sparring on a daily basis without the risk of great injury. A huge misconception most beginners have is that they must use total strength and power in order to prevail. Where as the more advance student often appears calm and relaxed with more focus on applying techniques in the most precise manner possible. Remember this next time your on the mat, try to avoid using strength to try to win, but focus more on proper technique. Try to RELAX! Watch the more advance students and ask questions. After all training is a time for experimentation and learning, not win at all cost. Train hard!