Sarcoplasmic hypertrophy, as opposed to myofibrillar hypertrophy, results in an increase in the volume of sarcolemma and / or sarcoplasm surrounding the myofibrils. Effectively an increase in everything other than the actual myofibrillar proteins (mitochondria, sarcoplasmic reticulum, t-tubules, and/or sarcoplasmic enzyme or substrate content). It is seen in those that train at a low intensity with high volume.