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:max_bytes(200000):strip_icc()/The-Super-Sweaty-30-Day-Arm-Challenge-That-Will-Sculpt-Your-Strongest-Arms-Ever-GettyImages-1224332329-2000-de700fd251b947a99824587fa2bbab89.jpg "This 30-Day Arm Challenge Will Help You Build Strength and Muscle")
This 30-Day Arm Challenge Will Help You Build Strength and Muscle
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I'm 12 years old and have 12-13 inch biceps. Is that good or normal? Sometimes I do pretty heavy lifting. - Quora
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Average Biceps Size: Building 15, 16, 17, 18, 19-Inch Arms - SET FOR SET
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