The Biceps Curl (seated) is used to strengthen and develop biceps of the arms. There are a variety of ways you can perform seated biceps curls including with a barbell, dumbells, a cable machine, on an adjustable bench or preacher curl bench.
START by grabbing the barbell with a shoulder-width, underhand grip and position yourself on the preacher bench so the top of the pad almost touches your armpits. Start wth your upper arms against the pad and your elbows slightly bent.
Keep your back straight as you curl the weight up until your forearms are just short of perpendicular to the floor. Return tot he starting