You are able to build dense muscles with little mass gains with high reps, but it depends on how you are training yourself. (fitnessblackandwhite.com)
That piece of dense muscle fibers that pumps blood helped you think? (religion.blogs.cnn.com)
While this athletic, spirited dog loves his exercise, his solid, dense muscle mass makes him heavier and not inclined to take up swimming. (petguide.com)