Sit on curl machine placing back of arms on pad. Grasp lever handles with overhand grip. Align elbows at near same pivot point as fulcrum of lever.
Raise lever handles toward shoulders. Lower handles until arm is fully extended. Repeat.
Seat should be adjusted to allow arm pit to rest near top of pad. Back of upper arm should remain on pad. If machine has secondary lever, elbows can be positioned further away from primary fulcrum.