Muscle hypertrophy in humans is primarily due to what? MCQ 04:39 Biomechanics Chapter 6 Muscle hypertrophy in humans is primarily due to what? A. increase in number of muscle fibers B. increase in size of muscle fibers C. both A and B D. none of the above Answer: B. increase in size of muscle fibers Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+