He presents it very well.Thats like the research that I was helping a professor at college conduct back in 1994. I was typing them by looking at the cells in a scope. I suspect he is using electrophoresis now. We studied elderly men, and took biopsies from their vastus lateralis. Pre and post training with weights. Might have had some biopsies during the training period too, cant remember. The professor was seeing that the distribution of muscle fiber types changed in response to weight training, and the men had fibers that were more on the fast twitch side of the continuum at the end of the study.