Unlike curls
performed in an upright position, or on an incline bench, those performed on
the preacher bench most accurately depict the true strength of the elbow
flexors. It is for this reason that the preacher curl is the gold standard to
which all other biceps exercises are compared to.
This isn’t to
suggest that curls done on the preacher curl are superior to curls with an
upright posture, or those performed lying on an incline bench, when it comes to
arm development, as they each stimulate the primary arm flexors to a different
degree, and thus provide more or less value, depending on one’s genetic makeup.
Because the preacher
bench all but eliminates the ability for other muscle groups to contribute to
the lift, it can be used as a diagnostic tool to highlight relative imbalances
that may exist between any of the primary elbow flexors.