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Two other muscles that should be mentioned when covering the biceps and how to build them bigger are the brachialis and the brachioradialis. It's important to note that the amount of force the biceps can produce is directly related to the position of the forearm and shoulder. Secondary functions of the biceps brachii are assisting in shoulder elevation and shoulder stabilization. Supination of the forearms (turning your wrists outwards).Flexion of the elbow while forearms are supinated or pronated (bending your arm in the same motion as a biceps curl).The short head begins at the coracoid process of the scapula then intersects with the long head in the mid-region without sharing any muscle fibers. Short Head: The short head of the biceps is smaller than the long head, but it adds width to the bicep you can think of it as the base to the peak. This mass then crosses the elbow joint and connects to the radius via the biceps tendon. The long head begins at the supraglenoid tubercle (small projection of the glenoid cavity close to the coracoid process) of the scapula then converges with the small head of the biceps. Long Head: The long head of the biceps is the bigger of the two heads, and it helps to create the peak of the biceps. The name biceps come from Latin, which translates to "two-headed-muscle." The biceps sit on the front of the upper arm opposite the triceps. The biceps are comprised of two heads the long and short head. With this knowledge, you'll be able to target the biceps more effectively so that you can build 15, 17, or even 19-inch biceps! Plus, we arm you with a sample biceps workout that is sure to give you an enormous pump!īefore we get into the average biceps size and how to grow those guns, we should briefly cover the anatomy of the biceps and how they function. Have you ever wondered how you measure up to the average size of biceps? Well, you came to the right place in this post, we cover the anatomy of the biceps, average size (for men and women), and tips on how to build those 15, 16, 17, 18, or 19 inch arms you've been working toward. Let's face it big bulging biceps aren't going out of style any time soon.