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Primary
Secondary
Tertiary
Difficulty
Novice
Force
Pull
Grips
Overhand
Mechanic
Isolation

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Grab the dumbbells with a pronated (overhand) grip. You can do this exercise thumbless if it's more comfortable on your wrists.
Flex at the elbows until your biceps touch your forearms. Try not to let your elbows flair outward.