Sit on seat or bench in font of two close high pulleys. Grasp stirrup with each hand (over or underhand grip). Position elbows to side.
Push one stirrup down by extending elbow until arm is straight. Return until forearm returns to original positon, keeping elbow close to side. Repeat with opposite arm and alternate.
If seat is positioned back behind pulleys as shown, bending forward can provide resistance at top of motion. See Angle of Pull.