Then they attach via a tendon to the upper forearm. Your biceps muscles ( biceps brachii to be specific ) have two heads (short and long), both of which attach separately to the scapula, then fuse together to form the “belly” of the muscle. The brachialis and brachioradialis (two other elbow flexors) also assist with the movement of the preacher curl exercise. But that doesn’t mean it’s the only muscle worked. The preacher curl is classified as an isolation exercise, meaning it only involves one joint and one muscle: the biceps. Here’s how to do a preacher curl properly, and some other helpful tips about this move and the muscles it works. And this is okay! What matters is that you’re able to engage your biceps with each and every rep-ultimately making them bigger and stronger. Since the preacher curl limits your ability to use momentum to help you curl the weight, you may find you can’t lift as much as you can with other biceps curl variations, like the classic standing dumbbell curl. “This move allows you to take the stability factor out of the exercise, which concentrates almost all of the force on the biceps,” says Cody Braun, CPT. This is because the preacher curl bench prevents you from using any momentum to complete the rep. Unlike other biceps curl variations, preacher curls force you to rely solely on the strength of your biceps to curl the weight. In fact, few exercises target the biceps as directly and effectively. If you really want to give your biceps a run for their money, look no further than the preacher curl.
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