![myofibrillar hypertrophy vs sarcoplasmic hypertrophy vs packing](https://houseofhypertrophy.com/wp-content/uploads/2021/07/myofibrillar-hypertrophy-vs-sarcoplasmic-hypertrophy-vs-myofibrillar-packing.png)
When it comes to muscles increasing in size, an increase in muscle fiber cross-sectional area appears to be one of the primary ways this occurs.
Specifically, there appear to be 3 underlying ways a muscle fiber can increase in cross-sectional area: myofibrillar hypertrophy, sarcoplasmic hypertrophy, and myofibrillar packing.
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