The Science of Building Muscle (Part 2)

In PART I we discussed about sarcoplasmic hypertrophy and the increase of non-contractile muscle tissue. In part II we’ll take a look at myofibrilar growth. Myofibrillar Hypertrophy Myofibrillar hypertrophy is the increase in the volume of the contractile parts inside the muscle fibers. Almost 80% of the muscle fiber’s density is comprised of these contractile parts, which leaves a great potential for muscle size growth. Muscles that have been trained either in a bodybuilding or strength training fashion, respond to the training stimulus by increasing the number of the contractile parts, which are actually actin and myosin filaments. This ultimately […]

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