HOW MUSCLE GROWTH
THE SCIENCE BEHIND MUSCLE !
Muscle growth – properly called hypertrophy – typically refers to an increase in the volume of myofibrils, the long proteins that make up muscle cells. This growth occurs as a biological response to stimuli, such as the intensive anaerobic exercise engaged in by powerlifters, bodybuilders, and other physique or strength athletes.
Working out with weights actually damages muscle fibers, and afterwards, the body starts to repair that damage:
- White blood cells rush to the injured muscles to reduce inflammation.
- Cytokines – special “cell-signaling” proteins – are released, further stimulating white blood cell response and triggering the production of satellite cells.
- Satellite cells can fuse with existing muscle fibers, facilitating repair and growth.
It is important to keep in mind that the muscle repair that turns into muscle growth does not happen during the workout – it occurs during periods of rest, for up to 48 hours following a workout. Real growth happens when the rate of repair happens faster than the damage. Since muscles get stronger and more resistant to damage the more they are exercised, the biggest gains are usually seen among beginners.

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