When you do seated incline curls, you’ll hit more of this the outer head of your bicep.When you do preacher curls, you’ll hit more of the inner head of your bicep.When you do tricep pushdowns you’ll hit more of the lateral and medial head of your tricep.When you do over head tricep extensions you’ll hit more of the long head of your tricep.When you do EZ bar curls with a wide grip you’ll hit the inner part of your bicep.When you use a narrow grip you’ll hit the outer part of your bicep. | Pfau F