The biceps and brachialis work closely together. The closer you get to the top, the more the brachioradialis gains leverage and picks up some of the work load. Think of it like a baton race. Some muscles carry the weight for a distance, but eventually pass it off to other muscles to complete the exercise’s range of motion Therefore, in order to optimally target a particular muscle, choose an exercise that places high resistance where that muscle has the best leverage to do the work (or) limit th