Lifting weights, vs. getting big
"But i still think i could go and do it if i have some agenda to get stronger like i really want to know, however all these excersizes you mention seem to involve a LOT of muscle growth, and wouldnt that make me heavy as hell? "
I'm a personal trainer here at my college, and I like to tell people this story who are afraid of lifting weights for fear that they'll get too big. I'll point to somoene who is lifting weights and I'll say "see that skinny guy over there? He's been coming here every other day for the past 3 years and he hasn't gotten any bigger at all."
The point is, training to be a bodybuilder (ie. adding SIZE as opposed to raw power) is a specific type of training. Not everyone who lifts weights wants to get big, and even fewer people who want to get big actually do :)
Isn't 10kgs like 20 or 30 pounds? Sorry, I'm over here in America and they don't teach us metric conversions, and I'm too lazy to go look it up. Well, 20 or 30 pounds of muscle is a good goal for a bodybuilder to add in a YEAR or so of training, if he trains hard, eats hard, rests hard, and knows exactly what he is doing. If you are training with weights to supplement your martial arts, you should have nothing to worry about. Besides, added mass like a bodybuilder doesn't come unless you eat like a bodybuilder. My point is, you are not eating like a bodybuilder unless you're consuming upwards of 4 to 5,000 calories a day (unless you're on the juice, in which case it's up to 8,000 cal/day).
Bottom line(s):
Unless you are specifically trying to put on muscle mass, it's not going to happen (other than maybe a few pounds, tops).
You will, however, notice extended muscular endurance, and increased strength. Size will come, but slowly.
When you are lifting, especially if you have low bodyfat percentage, you will notice that you get a "pump" in whatever muscle you are training, say, biceps in this example. Your muscle will appear fuller and bigger. This happens because the muscle fills with blood during training. A few hours after the muscle will go back to it's normal size. Remember that growth occurs when you eat and sleep, and NOT in the weight room. Don't think that because your bicep gets big when you train it that it has now become that size.
Hope this helped. If you have any more questions just ask :D :D :D
Iron