Incline biceps curls are considered as a biceps exercise which targets the
upper biceps as opposed to preacher curls which target the lower biceps. Whether
this is nonsensical 'bro science' or not is debatable. What is not debatable is
the incline biceps curl can help you stabilize your upper arms and isolate your
biceps because it makes it more difficult to cheat by swinging your body or
arms. Incline biceps curls can be performed on any incline bench at an angle of
your choice although between 65 and 75 degrees seems to be optimal.