RECENTLY, I,VE NOTICED I CANT FLEX (OR TIGHTEN) MY RIGHT BICEP. MY LEFT ARM IS FINE. I HAVE SOME PAIN IN MY ARM WHEN DRAWING MY ARM TOWARDS ME WITH WEIGHT ON IT . ANY IDEAS?
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I have the same problem on the left arm. Also when I do anything that takes skill the arm trembles. I have worked out for two years and nothing can make this muscle flex.
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