A strict arm isolation exercise performed on a preacher bench where each arm works individually to maximize focus and control. Rest your upper arms against the pad and curl one dumbbell upward while keeping your elbow fixed in place, then lower it slowly before switching sides. The supported position removes momentum and limits shoulder involvement, allowing deeper biceps activation and improved muscle symmetry.
Log your dumbbell alternate preacher curl sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.