direct forearm work is silly. if you want big forearms throw around big weights. how big is your arm in relation to your forearm? its probably relative and you just dont have big arms. your forearms are gonna grow with the rest of you.
anytime you are holding weight with your arms your forearms are working. especially dumbells. but in my opinion heavy deads are probably most important. no one i know that deads heavy has small forarms.
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