Muscle hypertrophy involves an increase in size of skeletal muscle through an increase in the size of its component cells. Hypertrophy can be broken down into two types of categories: myofibril and sarcoplasmic. Each of these specific types of muscle hypertrophy will result in increasing size of cells, but not of equal effect. Sarcoplasmic hypertrophy is focused on increasing the actual size of the muscle, and less on increasing strength. Myofibril hypertrophy will focus more on strength increase and less on an increase in the size of the skeletal muscle. Muscle hypertrophy is not achieved within minutes or days, rather it takes months of consistent training and proper nutrition to see the visual effects of body composition.
Read more about Muscle Hypertrophy: Hypertrophy Stimuli, Factors Affecting Hypertrophy, Myofibrillar Vs. Sarcoplasmic Hypertrophy, In Sports