The thing is that, if hyperplasia were to occur so regularly (it likely does occur, but the problem is to what extent) it would likely be in an instance where the muscle fibers can no longer continue to grow in size and must split for whatever reason. Bodybuilders would be the most extreme example of this and I am not aware of any literature that shows natural bodybuilders to display significant levels of hyperplasia, let alone say, a sprinter who is not approaching the limits of skeletal muscle hypertrophy.