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The Duel - A Female Muscle Growth Story by magnusmagneto We were certain to sit in as equal positioning as possible.  She wanted this competition to rely on our physical abilities alone.  It was agreed that we wouldn't bend our wrists or intentionally use any non-arm part of our bodies to provide additional power.   As we locked hands a surprising bulge rose from her arm.  She had certainly been working out since the last time I saw her, a few months ago.  I wondered if it was in preparation of this battle; as I arrived, she was insistent on arm-wrestling.  It didn't really matter though, I'm in decent enough shape thanks to my genetics, so