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TRAINING FOR MUSCLE

HYPERTROPHY

Hypertrophy

- ↑ in cross-sectional area (CSA) of existing

muscle fibres (i.e. muscle cells)

- contractile elements within the fibre enlarge,

and the extracellular matrix expands

Hypertrophy Involves:

– ↑ in synthesis of the contractile proteins Actin & Myosin w/in the myofibrils (↑ myofibril CSA)

– ↑ in the number of myofibrils within the muscle

fibre/cell (i.e. proliferation)

* New contractile proteins are added to the

external layers of the myofibril, resulting in

an increase in its diameter (Folland & Williams, 2007)

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