The whole mind set of wrestling is different. Its about pressure and being aggressive, but that doesn't mean you will end up with injuries. I still use both everyday in the gym, I only change it alittle. To say wrestling is a life thats true, but so is every sport if you want to be good at it. Pourya in my almost 10 years of wrestling I have never been hurt from being aggressive. I got hurt in jj and wrestling from making mistakes. Also "practice how you compete" is still true but in the right times. During drills in beginner class, no way but during rolling yes. If you watch me I train just like I compete, same set ups, same moves, same subs. I just don't force it the sub at the end.