Time required to grow biceps from 10 inches to 14 inches

Training Over 35 Lifter
21

Yes, my initial thought was that going from 10" circumference to 14", means roughly doubling the cross-section. If you think of the upper arm as a cylinder, double the volume too.

Doubling the size of an arm isn’t easy to do. You’d have to more than double the muscle, since the size of the bone is fixed and contributing to the initial size the same as it will to the latter size.

Thinking about arm size not as a circumference but as a cross-sectional area, gives me a perspective about making gains of 1/4", 1/2"… If you run the numbers on area, it starts to make sense how adding significant numbers to your arm circumference has been more difficult than expected.

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Assuming a circular shape for the cross-section of the arm.

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22

That makes a ton of sense! It really does put the concept of seemingly minute growth into perspective.

But then I thought…

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23

I don’t know why, but your post made me happy. Off to find a tape measure.

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24

Sometimes skinny guys can gain muscle really well. Untapped potential. You never know until you try

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25

I hate to bring up genetics, but how big are the dad’s arms?

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26

637 hours and 16 minutes under a combined average of 76% load intensity. The key will be to make sure your protein intake is at least 80% most of the time for a minimum of 97% of the total time frame. And carbs will help.

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