The preacher curl is a great exercise that isolates the biceps because there is no momentum involved. It is done in a seated position with the upper arms positioned against the preacher bench pad and the chest against it, hold the E-Z Curl Bar at shoulder length. This will be your starting position. Inhale as you pull the bar towards you and exhale as you slowly lower the bar until your upper arm is extended and the biceps is fully stretched.
 
Perform 3 sets of 12-15 repetitions! Watch your form.