Hypertrophy
From Biocrawler, the free encyclopedia.
Hypertrophy is the increase of the size of an organ. It should be distinguished from hyperplasia which occurs due to cell division; hypertrophy occurs due to an increase in cell size rather than division. It is most commonly seen in muscle that has been actively stimulated, the most well-known method being exercise.
Hypertrophy is only desirable when it occurs in the skeletal muscles. This is most effectively done by undertaking resistance training, though it can also occur during other high anaerobic excercises such as interval training, rowing, cycling and sprinting.
For hypertrophy to occur in the skeletal muscles, the muscle must be directly stimulated as discussed above. Also the a diet in which there is a caloric surplus and abundant in protein is required in conjunction with regular rest (8-10 hours per night). Though protein is an integral part of attaining muscular hypertrophy, it should not be overdone as it can put the kidneys under increased stress as it has to process more urea. Also you should consult with your physician before undertaking any excercise routine.
Hypertrophy can be pathological in many organs; for example in the heart hypertrophy of the left ventricle can be associated with up to a four fold risk of dying over the following 5 years. In skeletal muscle, it is usually helpful and increases strength.
External links
- University of California Muscle Physiology Home Page: Hypertrophy (http://muscle.ucsd.edu/musintro/hypertrophy.shtml)
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