No, its probably the biggest misconception in fitness.
If you know any bodybuilders, or people who follow traditional bodybuilders workouts (chest one day, back another day, legs and shoulders the next day etc.)
you'd see that the sets and reps they use are always 3 x 10 or something very similar.
Thats 30 reps per exercise, and the weight isnt very heavy. Bodybuilders look strong but most arnt because they've never lifted anything heavier than what they are comfortable lifting 10 times!
Strength training is usually around 5-6 reps per set. And, like it says on the tin, builds strength.
Have you ever noticed how at the Olympics, the women weight lifters can pull a 100kg barbell over their heads, yet they have slim figures and no 'bulky' muscle mass?
http://www.worldsportchicago.org/Portals/0/Sports/Weightlifting/FemaleWeightlifting.jpg
http://www.qsports.net/Melanie-Roach-Olympic-Trial.jpg
I won't say too much more at this point or I'll have nothing left for the full post. But, I'll leave you with this thought...
If you want to lower your body composition, then you train hard with intensity but
lower your calorie intake.
However, if you want to build muscle, you train hard with intensity, but excessively
increase your calorie intake.
Doesnt that tell you something? That exercise gives you the base, but its nutrition that becomes the deciding factor in which way your body composition goes...