If you focus on body builder type workouts, then you won't be training your aerobic power, which means less endurance. That's really just a case of if you don't practice, you don't get better -- you can work around that by combining body building with endurance exercise, but that would mean taking time away from bodybuilding, which is a question of priorities and goals.
As for speed and power, they definitely decrease with bodybuilding workouts. Bodybuilding workouts DO build strength, but they also lead to higher muscle tension.
In martial arts, the LAST thing you want is a lot of muscle tension -- the big, strong guys that train with me tend to get very frustrated by how effortless my blocks are when they attack me, and how painful my short strikes are -- again with an apparent lack of effort. In fact, more effort almost invariably leads to LESS power, as well as less speed -- because of a few factors:
1) You tend to use fewer muscles, and smaller ones
2) You tend to fight yourself a lot more, which holds you back
3) You tend to unbalance yourself, which compromises your ability to move and therefore your efficiency.
Having said all that, you CAN build muscle without taking on those disadvantages, but the trade off is that you will end up spending a significant portion of your training time on something other than body building in order to do it.
As for speed and power, they definitely decrease with bodybuilding workouts. Bodybuilding workouts DO build strength, but they also lead to higher muscle tension.
In martial arts, the LAST thing you want is a lot of muscle tension -- the big, strong guys that train with me tend to get very frustrated by how effortless my blocks are when they attack me, and how painful my short strikes are -- again with an apparent lack of effort. In fact, more effort almost invariably leads to LESS power, as well as less speed -- because of a few factors: 1) You tend to use fewer muscles, and smaller ones 2) You tend to fight yourself a lot more, which holds you back 3) You tend to unbalance yourself, which compromises your ability to move and therefore your efficiency.
Having said all that, you CAN build muscle without taking on those disadvantages, but the trade off is that you will end up spending a significant portion of your training time on something other than body building in order to do it.